Question

In plane transmission grating, the angle of diffraction for second order
spectrum of wavelength 5 x 10-2 cm is 30°. Calculate the number of line
per cm of the grating surface.​

Answer 1

In plane transmission grating, the angle of diffraction for second order

spectrum of wavelength 5 x 10-2 cm is 30°. Calculate the number of line

per cm of the grating surface.

Answer 2

Answer:

$given \:$

for second order n=2

$d = 1 \div n \\ d \sin(?) = n \times wavelength \\ 1 \div d = \sin(30) \div 2 \times 5 \times 10 ^{ - 5} \\ no. \: of \: line \: = 5000 \: line \div cm$