Light Waves: Properties, Reflection, Refraction, Lenses, and Mirrors

Question 1

Which of the following is a characteristic of a virtual image?

Accepted Answer

Cannot be projected onto a screen

Answer

Can be projected onto a screen

Answer

Always upright

Answer

Always inverted

Question 2

Which of the following is NOT an application of lenses?

Accepted Answer

Solar panels

Answer

Cameras

Answer

Microscopes

Answer

Telescopes

Question 3

Which of the following factors does NOT affect the speed of light in a medium?

Accepted Answer

Frequency

Answer

Refractive index

Answer

Temperature

Answer

Density

Question 4

Which of the following correctly describes the nature of light waves?

Accepted Answer

Transverse electromagnetic waves

Answer

Longitudinal electromagnetic waves

Answer

Transverse mechanical waves

Answer

Longitudinal mechanical waves

Question 5

The magnification of a lens is defined as the:

Accepted Answer

Ratio of the image height to the object height

Answer

Ratio of the object height to the image height

Answer

Ratio of the focal length to the object distance

Answer

Ratio of the object distance to the image distance

Question 6

Which phenomenon is primarily responsible for the formation of a rainbow?

Accepted Answer

Refraction and dispersion

Answer

Reflection

Answer

Diffraction

Answer

Interference

Question 7

Which of the following types of electromagnetic radiation has a shorter wavelength than visible light?

Accepted Answer

Ultraviolet radiation

Answer

Infrared radiation

Answer

Microwaves

Answer

Radio waves

Question 8

When two or more waves combine, the phenomenon known as:

Accepted Answer

Interference

Answer

Cancellation

Answer

Reflection

Answer

Refraction

Question 9

Interference occurs when:

Accepted Answer

Multiple waves combine to form a new wave

Answer

Multiple waves cancel each other out

Answer

Light diffracts through a narrow slit

Answer

Light bounces off a surface

Question 10

Which visible light color has the longest wavelength?

Accepted Answer

Red

Answer

Green

Answer

Blue

Answer

Violet

Question 11

Total internal reflection occurs when:

Accepted Answer

Light travels beyond the critical angle

Answer

Light moves from a denser to a less dense medium

Answer

Light strikes a surface perpendicularly

Answer

Light reflects off a rough surface

Question 12

An example of a plane wave is:

Accepted Answer

Light from a distant star

Answer

Laser light

Answer

Light from a street lamp

Answer

Light from a flame

Question 13

The speed of light in a vacuum is:

Accepted Answer

2.998 x 10^8 m/s

Answer

3 x 10^8 m/s

Answer

1.86 x 10^5 m/s

Answer

9.81 x 10^2 m/s

Question 14

Which of the following is a characteristic of light waves?

Accepted Answer

They can propagate through a vacuum.

Answer

They are longitudinal waves.

Answer

They travel at a constant speed in all media.

Answer

They require a medium to travel through.

Question 15

What options describe the behavior of light waves when they interact with a boundary between two different media?

Accepted Answer

They may be reflected, refracted, or both.

Answer

They are always reflected.

Answer

They are always refracted.

Answer

They are absorbed by the boundary.

Question 16

What is the focal length of a lens with a power of -2.00 diopters?

Accepted Answer

-0.50 m

Answer

0.50 m

Answer

-2.00 m

Answer

2.00 m

Question 17

Which phenomenon is responsible for the formation of a rainbow?

Accepted Answer

Dispersion

Answer

Reflection

Answer

Refraction

Answer

Diffraction

Question 18

Which of the following applications utilizes the principle of total internal reflection?

Accepted Answer

Fiber optic cables

Answer

Prisms

Answer

Lenses

Answer

Mirrors

Question 19

The critical angle is defined as the angle of incidence at which:

Accepted Answer

Total internal reflection occurs.

Answer

Refraction occurs.

Answer

Diffraction occurs.

Answer

Reflection occurs.

Question 20

When light moves from air into glass, which of the following occurs?

Accepted Answer

Refraction

Answer

Diffraction

Answer

Dispersion

Answer

Reflection

Question 21

Which type of lens causes light rays to diverge?

Accepted Answer

Concave lens

Answer

Plano-concave lens

Answer

Plano-convex lens

Answer

Convex lens

Question 22

What is the critical angle for total internal reflection when light travels from water into air?

Accepted Answer

42 degrees

Answer

30 degrees

Answer

48 degrees

Answer

56 degrees

Question 23

Which colour of light has the longest wavelength?

Accepted Answer

Red

Answer

Blue

Answer

Green

Answer

Violet

Question 24

Which statement about polarised light is correct?

Accepted Answer

It vibrates in a single direction perpendicular to the direction of travel.

Answer

It vibrates in all directions perpendicular to the direction of travel.

Answer

It has a higher intensity than unpolarised light.

Answer

It cannot be produced by reflection or refraction.

Question 25

What is the primary purpose of an anti-reflection coating on a lens?

Accepted Answer

To increase the amount of light transmitted through the lens

Answer

To reduce glare and reflections

Answer

To focus light more accurately

Answer

To make the lens more durable

Question 26

When light encounters a boundary between two transparent materials, which of the following phenomena occur?

Accepted Answer

Both reflection and refraction

Answer

Only reflection

Answer

Only refraction

Answer

Neither reflection nor refraction

Question 27

The speed of light in a vacuum, rounded to two significant figures, is:

Accepted Answer

3.0 x 10^8 m/s

Answer

1.6 x 10^8 m/s

Answer

4.2 x 10^8 m/s

Answer

6.6 x 10^8 m/s

Question 28

A concave mirror has a radius of curvature of 20 cm. What is its focal length?

Accepted Answer

10 cm

Answer

15 cm

Answer

20 cm

Answer

25 cm

Question 29

The wave-particle duality of light indicates that:

Accepted Answer

Light exhibits characteristics of both waves and particles.

Answer

Light is exclusively a wave phenomenon.

Answer

Light is exclusively a particle phenomenon.

Answer

Light can only behave as a wave or a particle, but not simultaneously.

Question 30

Which of the following properties does NOT apply to light waves?

Accepted Answer

Longitudinal

Answer

Transverse and electromagnetic

Answer

Can travel through a vacuum

Question 31

As a ray of light passes from air to water, what happens?

Accepted Answer

It bends towards the normal

Answer

It bends away from the normal

Answer

Its speed and frequency remain unchanged

Question 32

Which material has the highest refractive index?

Accepted Answer

Diamond

Answer

Air

Answer

Water

Answer

Glass

Question 33

What is the phenomenon called when white light separates into individual colors?

Accepted Answer

Dispersion

Answer

Refraction

Answer

Reflection

Answer

Absorption

Question 34

In a vacuum, what is the speed of light?

Accepted Answer

299,792,458 m/s

Answer

340 m/s

Answer

186,000 miles per second

Question 35

Which light source emits monochromatic light?

Accepted Answer

Laser

Answer

Incandescent bulb

Answer

Fluorescent lamp

Answer

Sunlight

Question 36

Which of the following is a characteristic of transverse waves, such as light waves?

Accepted Answer

Oscillations occur perpendicular to the direction of propagation.

Answer

They require a medium to travel through.

Answer

They can only travel in a vacuum.

Answer

Their speed is constant in all media.

Question 37

When light encounters a boundary between two transparent materials, it can undergo which of the following interactions?

Accepted Answer

Both reflection and refraction.

Answer

Reflection only.

Answer

Refraction only.

Answer

Neither reflection nor refraction.

Question 38

In the context of light striking a boundary between two materials, the angle of incidence is defined as the angle between the:

Accepted Answer

Incident ray and the normal to the surface.

Answer

Reflected ray and the normal to the surface.

Answer

Refracted ray and the normal to the surface.

Answer

Incident ray and the refracted ray.

Question 39

Which of the following materials has the lowest refractive index?

Accepted Answer

Air

Answer

Water

Answer

Glass

Answer

Diamond

Question 40

Which of the following aberrations is caused by the lens having a non-uniform curvature?

Accepted Answer

Spherical aberration

Answer

Chromatic aberration

Answer

Astigmatism

Answer

Field curvature

Question 41

The resolving power of an optical instrument is:

Accepted Answer

Its ability to distinguish between two closely spaced objects.

Answer

Its ability to magnify objects.

Answer

Its ability to gather light.

Answer

Its ability to form sharp images.

Question 42

Which of the following is NOT an application of the interference of light?

Accepted Answer

Ultrasound imaging

Answer

Holography

Answer

Laser pointers

Answer

Optical fibers

Question 43

The speed of light in a vacuum is approximately:

Accepted Answer

300,000 kilometers per second

Answer

100,000 kilometers per second

Answer

1,000,000 kilometers per second

Answer

3,000,000 kilometers per second

Question 44

Which of the following is the correct order of electromagnetic waves from longest to shortest wavelength? Starting from the longest wavelength

Accepted Answer

Radio waves, Microwaves, Infrared radiation, Visible light, Ultraviolet radiation

Answer

Visible light, Ultraviolet radiation, Infrared radiation, Microwaves, Radio waves

Answer

Ultraviolet radiation, Visible light, Infrared radiation, Microwaves, Radio waves

Answer

Microwaves, Infrared radiation, Visible light, Ultraviolet radiation, Radio waves

Question 45

What happens to a ray of light when it strikes a boundary between two transparent materials with different refractive indices at an angle?

Accepted Answer

It bends towards the normal

Answer

It bends away from the normal

Answer

It reflects back

Answer

It passes straight through without bending

Question 46

A converging lens forms a real image when the object is located:

Accepted Answer

Beyond the focal point

Answer

Between the focal point and the lens

Answer

At the focal point

Answer

Less than 2 focal lengths away from the lens

Question 47

Total internal reflection occurs when:

Accepted Answer

The angle of incidence is greater than the critical angle

Answer

The angle of incidence is less than the critical angle

Answer

The refractive index of the first medium is greater than the second medium

Answer

The refractive index of the second medium is greater than the first medium

Question 48

Which of the following is NOT a property of light waves?

Accepted Answer

They have mass

Answer

They travel in straight lines

Answer

They can be reflected

Answer

They can be refracted

Question 49

What is the law that describes the relationship between the angle of incidence and the angle of refraction?

Accepted Answer

Snell's law

Answer

Huygens' principle

Answer

Law of reflection

Answer

Law of conservation of energy

Question 50

A convex mirror is used as a passenger-side mirror on cars because it:

Accepted Answer

Provides a wide field of view

Answer

Magnifies objects

Answer

Reflects light rays parallel to each other

Answer

Forms real images

Question 51

What is the focal length of a plane mirror?

Accepted Answer

Infinity

Answer

0

Answer

Equal to the distance from the mirror to the object

Answer

Equal to the distance from the mirror to the image

Question 52

Which of the following devices uses a combination of lenses and mirrors to produce a magnified image of a small object?

Accepted Answer

Microscope

Answer

Telescope

Answer

Camera

Answer

Projector

Question 53

What is the speed of light in a vacuum?

Accepted Answer

299,792,458 m/s

Answer

300,000,000 m/s

Answer

340 m/s

Answer

186,282 mi/s

Question 54

Which of the following is NOT a property of light waves?

Accepted Answer

They require a medium to propagate

Answer

They can propagate in a vacuum

Answer

They are electromagnetic waves

Answer

They can be diffracted

Question 55

When a light wave strikes a plane mirror, what phenomenon occurs?

Accepted Answer

Reflection

Answer

Absorption

Answer

Refraction

Answer

Polarization

Question 56

As a ray of light traveling in air enters a glass block, which of the following describes the refracted ray?

Accepted Answer

Bends towards the normal

Answer

Bends away from the normal

Answer

Does not change direction

Answer

Is totally reflected back into the air

Question 57

Which type of lens is used to form a real and inverted image?

Accepted Answer

Convex lens

Answer

Concave lens

Answer

Plane mirror

Answer

Convex mirror

Question 58

Which color of visible light has the shortest wavelength?

Accepted Answer

Blue

Answer

Red

Answer

Orange

Answer

Yellow

Question 59

What is the approximate value of the speed of light in a vacuum?

Accepted Answer

3 x 10^8 m/s

Answer

300,000 km/s

Answer

186,000 miles per second

Answer

The speed of sound

Question 60

Which instrument is used to measure the intensity of light?

Accepted Answer

Lux meter

Answer

Voltmeter

Answer

Ammeter

Answer

Ohmmeter

Question 61

The SI unit of luminous intensity is known as the:

Accepted Answer

Candela

Answer

Hertz

Answer

Newton

Answer

Watt

Question 62

The focal length of a lens is defined as the distance between the lens and the point where:

Accepted Answer

Parallel rays of light converge after passing through the lens

Answer

Diverging rays of light converge after passing through the lens

Answer

Converging rays of light diverge after passing through the lens

Answer

Parallel rays of light diverge after passing through the lens

Question 63

Which of the following is NOT a property of electromagnetic waves?

Accepted Answer

They always require a medium to propagate

Answer

They can travel through a vacuum

Answer

They are transverse waves

Answer

They have a wavelength and frequency

Question 64

A diffraction grating can be used to:

Accepted Answer

Disperse light into its component wavelengths

Answer

Focus light into a beam

Answer

Reflect light at a specific angle

Answer

Polarize light