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

Energy will be equal to
`6.6* 10^(-27)J`

Frequency will be equal to
`12* 10^8Hz`

Step-by-step explanation:

We have given frequency of the radar f = 10 GHz
`=10* 10^6Hz`

Speed of light
`c=3* 10^8m/sec`

Plank's constant
`h=6.6* 10^(-34)js`

So energy
`E=h\\u`,here h is plank's constant and
`\\u` is frequency

So energy
`E=6.6* 10^(-34)* 10^(7)=6.6* 10^(-27)J`

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

Wavelength is equal to
`\lambda =(c)/(f)`

So
`f=(c)/(\lambda )=(3* 10^8)/(0.25)=12* 10^8Hz`

So frequency will be equal to
`12* 10^8Hz`