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

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

What is the maximum usuable frequency (in MHz) for E-layer of atomosphere having critical frequency 4 MHz, when the angle of incidence is 60^(@)

The maximum usable frequency in F-layer with original frequency in 50 MHz will be

The maximum usable fequency in F-layer with original frequency in 50 MHz will be

If critical frequency is 40 MHz then calculate maximum density of electron-

If critical frequency is 40 MHz then calculate maximum density of electron-

In earth's atmosphere , for F_(2) - layer, the virtual height and critical frequency in night time are

In earth's atmosphere for F_(1) -layer , the virutal height and critical frequency are