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 diffraction grating consisting of 4000 slits per centimeter is illuminated with a monochromatic light that produces the second order diffraction at an angle of 30 ^(@) . What is the wavelenght of the light used?

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:

A diffraction grating used at normal incidence gives a line lamda_(1)=600Å in a certain order supermposed on another line lamda_(2)=450Å of the next higher order. If the angle of diffraction is 30^(@) how many lines are there in 1 cm of the grating.

Aparallel beam of sodium lignt falls normally of a plane grating having 4240 lines per cm. A second order line is obseved at 30^(@) to the normal. Find the wavelength. What is the highest order that can be observed with this grating? Will this line appear to be of the same colour in each order ?