Question

A certain part of the electromagnetic spectrum ranges from 200 nm to 400 nm. What is the lowest frequency associated with this portion of the spectrum?

Answer 1

Answer:

the lowest frequency is $7.5\times 10^{14} Hz$

Explanation:

In the question it is given that wavelength(L) in the range of 200μm to 400μm.

let ν be frequency of wave v velocity = 3\times 10^8

velocity v= Lν

therefore ν=$\frac{v}{L}$

frequency ν be lopwest when L will be heighest

ν(lowest)=$\frac{3\times 10^8}{400\times 10^-9}$

ν=$7.5\times 10^{14} Hz$