Question

Calculate the wavelength in centimeters of radar energy at a frequency of 10 GHz. What is the frequency in gigahertz of radar energy at a wavelength of 25 cm

Answer 1

Answer:

Energy will be equal to $6.6\times 10^{-27}J$

Frequency will be equal to $12\times 10^8Hz$

Explanation:

We have given frequency of the radar f = 10 GHz $=10\times 10^6Hz$

Speed of light $c=3\times 10^8m/sec$

Plank's constant $h=6.6\times 10^{-34}js$

So energy $E=h\nu$,here h is plank's constant and $\nu$ is frequency

So energy $E=6.6\times 10^{-34}\times 10^{7}=6.6\times 10^{-27}J$

In second case we have given wavelength = 25 cm = 0.25 m

Wavelength is equal to $\lambda =\frac{c}{f}$

So $f=\frac{c}{\lambda }=\frac{3\times 10^8}{0.25}=12\times 10^8Hz$

So frequency will be equal to $12\times 10^8Hz$