The frequency of `E.M` wave which is best suited to observe a particle of radius `3xx10^(-4) cm` is of order of:

Options

A. `10^(15)Hz`
B. `10^(14)Hz`
C. `10^(13)Hz`
D. `10^(12)Hz`

Answer

A

Explanation

Let `lambda` be the radius of the particle then
`lambda=3xx10^(-4)xx10^(-2)m=3xx10^(-6)m`
Frequency of electromagnetic wave,
`upsilon=(c)/(lambda)=(3xx10^(8))/(3xx10^(-6))=10^(14)`
Thus to obseve the particle, the frequency of wave should be more than `10^(14)` i.e `10^(15)` Hz or smaller value of wavelength.