Waves/Electricity Review Test

In a vacuum, all electromagnetic waves have the same

• amplitude

• frequency

• wavelength

• speed

Which statement about wave propagation is correct?

• Light waves move fastest through a diamond.

• Radio waves move faster through glass than through air.

• Sound waves move faster through air than through glass.

• Electromagnetic waves move fastest through a vacuum.

Suppose a scientist detects an electromagnetic wave with a frequency higher than those of gamma rays. The scientist labels this wave a Z-ray. Which of the following would always be true of a Z-ray?

• A Z-ray would have a lesser amplitude than gamma rays.

• A Z-ray would have a greater amplitude than gamma rays.

• A Z-ray would have a shorter wavelength than gamma rays.

• A Z-ray would have a longer wavelength than gamma rays.

Which of the lists below orders the following electromagnetic waves from longest to shortest wavelength?

• x-ray, ultraviolet, visible light

• ultraviolet, x-ray, visible light

• visible light, ultraviolet, x-ray

• ultraviolet, visible light, x-ray

Which part of the EM spectrum is used in night vision goggles?

• X-ray

• Microwave

• Visible

• Infrared

Which of the following is arranged from highest to lowest frequency?

• X-ray, infra-red, red light, UV, radiowave

• Radiowave, infra-red, red light, UV, x-ray

• Radiowave, UV, red light, infra-red, x-ray

• X-ray, UV, red light, infra-red, radiowave

White light is refracted as it passes from the air into a glass prism, separating the colors that make up the original white light. This happens because

• all light travels at the same slower speed in glass than in air

• all light travels at the same faster speed in glass than in air

• different colors of light travel at different speeds in glass

• red light travels faster in glass than in air

Light passes from medium 1 into medium 2 and bends along the path shown to the right. Which of the following statements is correct?

• Medium 1 is denser than medium 2.

• Medium 2 is denser than medium 1.

• The speed of the light is greater in medium 2 than in medium 1.

• The frequency of light is greater in medium 1.

The diagram on the left represents which of the following forms of wave interaction?

• diffraction of light

• polarization of light

• reflection of light

• refraction of light

Which of the following terms best describes the workings of a fiber optic cable?

• complete diffraction

• the Doppler Effect

• total internal reflection

• minimal refraction