Question

An electromagnetic wave has a time period of 4 × 10^-8 s. Calculate its frequency in MHz.

Answer 1

Time period = T = 4 × 10^-8 s
Frequency of sound = ƒ =?

f = `1/"T"`

f = `1/(4xx10^-8)`

= 0.25 × 10⁸ = 2.5 × 10⁷ Hz

Convert Hz to MHz

1 MHz = 10⁶ Hz

`f = (2.5 xx 10^7)/10^6`

= 25 MHz