Radio Waves and Applications — Unit test Answers

Ultraviolet light from a distant star is traveling at 3.0 × 108 m/s. How long will it take for the light to reach Earth if it must travel 4.0 × 1013 km?

The transverse wave shown has a wavelength of 1.5 m and is traveling in the x-direction.

A car’s horn produces a constant frequency of 350 Hz as it passes by Suzy. What is the best estimate of the frequency Suzy hears after the car passes her?

What best describes the motion of the medium particles in a longitudinal wave?

What best explains why a person can become sunburned by spending too much time at the beach?

Karl listed the steps involved when information is sent from transmitters to receivers.1 - A signal is produced. 2 - Radio waves are modulated and amplified. 3 - An antenna sends modulated waves through the air. 4 - An antenna captures the modulated waves. 5 - A signal is heard, seen, or used.

_______interference occurs when two waves overlap and the resulting wave has a larger amplitude.

Two pulses are moving along a string. One pulse is moving to the right and the second is moving to the left. Both pulses reach point X at the same instant.

Visible light travels at a speed 3.0 × 108 of m/s. If red light has a wavelength of 6.5 × 10–7 m, what the frequency of this light?

What is the main difference between a longitudinal wave and a transverse wave?

A longitudinal wave is shown.

A boy yells in a narrow valley. The sound reflects off of a boulder that is 80 m away. How long will it take to hear the echo if the speed of a sound wave is 320 m/s?(speed = )

What best describes white light as it travels through a prism? Check all that apply.

amplifydissipatespeed upvibrate