If a single slit fraunhoffer diffraction set up is used with light of wavelength `4000Å`. Distance D between central maximum and first minimum found to be `0.3 cm` in set up if the wavelength changed to `6000Å` the corresponding value of D will be

Options

A. `0.20 cm`
B. `0.24 cm`
C. `0.30 cm`
D. `0.45 cm`

Answer

D

Explanation

Distance betweeen central bright and first minimum,
`y=(D lambda)/(d)`
`(y_(1))/(y_(2))=(lambda_(1))/(lambda_(2))`