# physics

posted by .

A certain radar installation used to track airplanes transmits electromagnetic radiation of wavelength 7 cm.

(a) What is the frequency of this radiation, measured in billions of hertz (GHz)? __________GHz

(b) What is the time required for a pulse of radar waves to reach an airplane 3 km away and return? ________s

• physics -

a) use the wave equation
frequency*wavelength=speed of light

b) time= 2*3km/speedlght

• physics -

What is the time required for a pulse of radar waves to reach an airplane 7 km away and return?

## Similar Questions

2. ### Physics

3.A certain radar installation tracks airplanes by transmitting electromagnetic radiation of wavelength 3 cm. a) Show that the frequency of this radiation is 10 GHz. b) Show that the time required for a pulse of radar waves to reach …
3. ### Chem

which of the following statements is true regarding electromagnetic radiation?
4. ### Physics

if the frequency of a particular electromagnetic wave is 4 x 10^14 hertz, what is its wavelength of the radiation in nanometers (nm)?
5. ### physics

A certain radar installation tracks airplanes by transmitting electromagnetic radiation of wavelength 4.0 cm. a)Find the frequency of this radiation. b)Find the time required for a pulse of radar waves to reach an airplane 4.8 km away …
6. ### physics

Electromagnetic radiation having a 12.0 µm wavelength is classified as infrared radiation. What is its frequency?
7. ### physics

A radar installation that is used to track airplanes transmits electromagnetic radiation with a wavelength of 4 cm. Calculate the frequency of this radiation in Hz. Calculate the time required for a pulse of radar waves to reach an …
8. ### physics

A radar installation that is used to track airplanes transmits electromagnetic radiation with a wavelength of 4 cm. Calculate the frequency of this radiation in Hz.
9. ### Science

1. A certain radar installation transmits electromagnetic radiation with a wavelength of 2.5 cm. What is the frequency of this radiation?
10. ### biology

9. A certain radar installation transmits electromagnetic radiation with a wavelength of 2.5 cm. What is the frequency of this radiation?

More Similar Questions