The value of Planck's constant is `6.63 xx 10^-34 Js`. The speed of light is `3 xx 10^(17)nms^(-1)`. Which value is closest to the wavelength of quantum of light with frequency of `6 xx 10^15 sec^-1` ?

Options

A. 50
B. 75
C. 10
D. 25

Answer

A

Explanation

`v = c/lambda " or " lambda = c/v`
`lambda = (3 xx 10^(17) nm s^(-1))/(6 xx 10^(15) s^(-1)) = 50 nm`.