Question

A spacecraft is approaching the earth. Relative to the radio signals it sends out, the signal is received on the earth have a _____________ frequency.

Answer 1

Answer:

Explanation:some 15000 fq

Answer 2

The answer is 15000 fq

Explanation:

• The frequency of sound increases in accordance with the Doppler Effect when a spacecraft approaches Earth.
• As a result, the wavelengths of the signals detected on Earth are shorter.
• In the electromagnetic spectrum, radio waves have the longest wavelengths.
• They range in size from a football to the size of our entire planet.
• In the late 1880s, Heinrich Hertz demonstrated the existence of radio waves.