In electromagnetic spectrum , the frequencies of `alpha` - rays , X - rays and ultraviolet rays are denoted by `n_(1) , n_(2)` and `n_(3)` respectively then

Options

A. `n_(1) gt n_(2) gt n_(3)`
B. `n_(1) lt n_(2) lt n_(3)`
C. `n_(1) lt n_(2) lt n_(3)`
D. `n_(1) lt n_(2) lt n_(3)`

Answer

A

Explanation

Frequency range of ultraviolet
`= 10^(16) - 8 xx 10^(14) (n_(3))`
Frequency range of X-rays = `3 xx 10^(19) - 10^(16) (n_(2))`
Frequency range of `gamma` - rays
`= 5 xx 10^(20) - 3 xx 10^(19) (n_(1)) therefore n_(1) gt n_(2) gt n_(3)`