Chapter 18 Practice

The primary colors of light are

• green, blue, and black
• cyan, magenta, and yellow
• red, yellow, and blue
• blue, green, and red

Which of the following occurs as a light wave bends when it passes from one medium into another?

• constructive interference
• refraction
• destructive interference
• reflection

Cellular telephones utilize

• radar waves
• very high frequency waves
• very low frequency waves
• microwaves

the full range of frequencies of electromagnetic radiation is called

• visible light
• radio waves
• electromagnetic spectrum
• invisible radiation

A communications satellite transmits a radio wave at a frequency of 4.6 x 10(9) Hz.  What is the signals wavelength?

• 0.65 m
• 0.065 m
• 6.5 m
• 65 m

Electromagnetic waves 

• are transverse waves
• do not need a medium
• travel at the speed of light
• all of the above

The primary colors of pigments

• are cyan, yellow, magenta
• are the same as the secondary colors of light
• combine in equal amounts to produce black
• all of the above

The visible light spectrum ranges between

• radar and x-rays
• television waves and infrared rays
• infrared rays and ultraviolet rays
• ultraviolet rays and gamma rays

An electromagnetic wave in a vacuum has a wavelength of 0.07 m.  What is its frequency?

• 3.0 x 10^8 m/s
• 4.3 x 10^9 Hz
• 3.0 x 10^9 Hz
• 4.3 x 10^8 m/s

In 1926, Michelson was able to measure the speed of light using

• lanterns
• stars
• mirrors
• sunlight