A plane transmissio grating when illuminated with normal light produces a second order diffraction at `30^(@)` for wavelength `lamda`=500 `Å.` Calculate the number of lines per cm on the grating.

A diffraction garating has 5,000 rulings per centimetre. What is the second order diffraction angle for violent light ( lamda = 500 nm).

A 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.

A diffracting grating 1 cm wide has 1200 lines and is used in second order. What is the diffraction angle for light of wavelength 550 nm?

A. diffraction grating has 800 lines per mm and is illuminated normally by parallel monochromatic light of wavelengths 560 nm and 590 nm. Calculate the difference in the angular positions of the first order spectra of the two lights on th same suide of the normal.

With light falling normally on a diffraction grating, the angle of diffraction of second order is equal to 45^(@) for a wavelength lambda_(1) = 0.65mum . Find the angle of diffraction of third order for a wave length lambda_(2) = 0.50 mu m .

A 30mm wide diffraction grating produces a deviation of 30^@ in the second order principal maxima. The wavelength of light used is 600nm . The total number of slits in the grating is: