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Maximum usable frequency (MUF) in F-regi...

Maximum usable frequency (MUF) in F-region layer is x, when the critical frequency is 60 MHz and the angle of incidence is `70^(@)`, then x is

A

`150 MHz`

B

`170 MHz`

C

`175 MHz`

D

`190 MHz`

Text Solution

Verified by Experts

The correct Answer is:
C
(`3`) `MUF=(f_(c))/(cos theta)=(60)/(cos 70^(@))=175MHz`
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