Electromagnetic Waves: Dive into the World of Light and Beyond

Question 1

Which of the following is not part of the electromagnetic spectrum?

Accepted Answer

Sound waves

Answer

Visible light

Answer

Radio waves

Answer

Gamma rays

Question 2

Which material allows electromagnetic waves in the visible spectrum to pass through?

Accepted Answer

Glass

Answer

Metal

Answer

Wood

Answer

Concrete

Question 3

The energy carried by an electromagnetic wave is:

Accepted Answer

Proportional to its frequency

Answer

Inversely proportional to its wavelength

Answer

Independent of its wavelength and frequency

Answer

Dependent on its amplitude and wavelength

Question 4

The relationship between the wavelength and frequency of an electromagnetic wave can be described as:

Accepted Answer

Inversely proportional

Answer

Directly proportional

Answer

Not related

Answer

Dependent on the medium through which it travels

Question 5

Polarization of an electromagnetic wave refers to:

Accepted Answer

The direction of vibration of the electric field

Answer

The direction of propagation of the wave

Answer

The wavelength of the wave

Answer

The amplitude of the wave

Question 6

Which type of electromagnetic wave is classified as non-ionizing?

Accepted Answer

Visible light

Answer

Gamma rays

Answer

X-rays

Answer

Ultraviolet light

Question 7

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

Accepted Answer

They can only exist in a material medium.

Answer

They are transverse waves.

Answer

They can travel through a vacuum.

Answer

They are produced by oscillating charges.

Question 8

The speed of electromagnetic waves in a vacuum is approximately:

Accepted Answer

3 x 10^8 m/s

Answer

100 m/s

Answer

3 x 10^2 m/s

Answer

3 x 10^5 m/s

Question 9

The phenomenon where light exhibits both wave-like and particle-like properties is known as:

Accepted Answer

Wave-particle duality

Answer

Electromagnetic induction

Answer

Photoelectric effect

Answer

Compton scattering

Question 10

Which of the following devices converts electromagnetic waves into electrical signals?

Accepted Answer

Antenna

Answer

Resistor

Answer

Inductor

Answer

Capacitor

Question 11

The electric and magnetic fields of an electromagnetic wave are:

Accepted Answer

In phase and perpendicular to each other

Answer

Out of phase and parallel to each other

Answer

In phase and parallel to each other

Answer

Out of phase and perpendicular to each other

Question 12

Which of the following materials is least transparent to electromagnetic waves?

Accepted Answer

Metal

Answer

Wood

Answer

Glass

Answer

Water

Question 13

The frequency of an electromagnetic wave is related to its wavelength by the equation:

Accepted Answer

f = c / λ

Answer

f = λ / c

Answer

f = c * λ

Answer

f = λ * c

Question 14

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

Accepted Answer

They exhibit particle-like behavior.

Answer

They are transverse waves.

Answer

They can travel through a vacuum.

Answer

They can be polarized.

Question 15

Which of the following waves has the lowest frequency?

Accepted Answer

Radio waves

Answer

Microwaves

Answer

Infrared radiation

Answer

Gamma rays

Question 16

The wave-particle duality of electromagnetic waves refers to their ability to:

Accepted Answer

Behave as both waves and particles.

Answer

Behave only as waves.

Answer

Behave only as particles.

Answer

Behave neither as waves nor particles.

Question 17

Which of the following phenomena is caused by the interference of electromagnetic waves?

Accepted Answer

Rainbow

Answer

Eclipse

Answer

Volcano eruption

Answer

Tides

Question 18

Which of the following materials is opaque to electromagnetic waves?

Accepted Answer

Metal

Answer

Glass

Answer

Wood

Answer

Concrete

Question 19

Which of the following applications utilizes the reflection of electromagnetic waves?

Accepted Answer

Radar

Answer

X-ray imaging

Answer

Microscopy

Answer

Sonar

Question 20

The refraction of electromagnetic waves occurs when they pass from one medium to another with:

Accepted Answer

Different densities

Answer

Different temperatures

Answer

Different pressures

Answer

Different chemical compositions

Question 21

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

Accepted Answer

They can be longitudinally polarized.

Answer

They are transverse in nature.

Answer

They travel at the speed of light in a vacuum.

Answer

They can travel through a vacuum.

Question 22

What is the relationship between wavelength (λ), frequency (f), and speed (c) of an electromagnetic wave?

Accepted Answer

f = c/λ

Answer

λ = c/f

Answer

c = λf

Answer

λf = c

Question 23

Which type of electromagnetic wave has the highest frequency?

Accepted Answer

Gamma rays

Answer

Radio waves

Answer

Microwaves

Answer

Infrared waves

Question 24

What is the phenomenon known as the photoelectric effect?

Accepted Answer

The emission of electrons from a metal when exposed to light.

Answer

The absorption of light by a metal, causing an increase in its temperature.

Answer

The deflection of light by a magnetic field.

Answer

The production of an electric current when a conductor is moved in a magnetic field.

Question 25

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

Accepted Answer

Cooking food

Answer

Communication

Answer

Medical imaging

Answer

Power transmission

Question 26

What is the refractive index of a medium?

Accepted Answer

The ratio of the speed of light in the medium to the speed of light in a vacuum.

Answer

The ratio of the speed of light in a vacuum to the speed of light in the medium.

Answer

The ratio of the wavelength of light in a vacuum to the wavelength of light in the medium.

Answer

The ratio of the frequency of light in a vacuum to the frequency of light in the medium.