What will be the diffraction angle of first order maxima in diffraction obtained due to light of wavelength 55nm and width of slit 0.55 mm ?

Options

A. `0.0015` radian
B. `0.00015` radian
C. `0.003` radian
D. `0.0010` radian

Answer

B

Explanation

For first order maxima `d sin theta_(m)=((2m+1)lambda)/(2)`
`d sin theta_(1)=(3lambda)/(2) " " lambda=5xx10^(-7)m`
`d=55xx10^(-5)m`
`:. sintheta_(1)=(3lambda)/(2d)=(3)/(2)xx(55xx10^(-9))/(55xx10^(-5))`
`=(3)/(2)xx10^(-4)=0.00015` radian