Question

To which part of the electromagnetic spectrum does a wave of frequency `5xx10^(19)`Hz belong ?
A. Ultraviolet region
B. X-ray region
C. Infrared region
D. Visible region

Answer 1

Correct Answer - C
`lambda=(C)/(v)=( 3 xx 10^(8))/( 6 xx 10^(12))=5 xx 10^(-5)`
`:. lambda = 500 xx 10^(-7) m ` i.e. `lambda gt lambda_R `
`:. ` This lies in the infrared region.