_____ 11. Which statement is not true of all electromagnetic wave?

a. They are transverse waves.

b. They cannot travel in a vacuum.

c. They are produced by accelerating charges.

d. They have magnetic and electric components.

_____12. Among the electromagnetic waves, which has the highest energy?

a. Gamma rays

b. Microwaves

c. Radio waves

d. X-rays

____13. Which frequency range is used by FM radios?

a. Low frequency

b. Medium frequency

c. Ultra-high frequency

d. Very high frequency

____14. Which waves are often used for communication?

a. Ultraviolet rays

b. Infrared rays

c. Radio waves

d. Gamma rays

____15. Honeybees can see light of shorter wavelengths than humans, but they cannot see red light. What do you think is the kind of radiation that Honeybees can see?

a. Ultraviolet rays

b. Gamma rays

c. Radio waves

d. Visible light

____16. The speed of sound in a medium depends upon the ______.

a. Properties of the medium

b. Wavelength

c. Amplitude

d. Frequency

____17. Sound and light waves both ______.

a. Travel as longitudinal waves

b. Follow the laws of reflection

c. Have the same wavelength

d. Travel through vacuum

____18. The speed of light in a vacuum is ______.

a. found by average the different speeds of all the different colors of light.

b. the same for all the different colors of light.

c. higher for green light than for violet light.

d. higher for blue light than for red light.

____19. Light is a form of energy produced by a ____.

a. Non-luminous object

b. Transparent object

c. Luminous object

d. Opaque object

___20. Which of the following theories propose that light is a particle?

a. Electromagnetic Theory of Light

b. Corpuscle Theory of Light

c. Quantum T Theory

d. Wave Theory of Light

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