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 ?

A diffraction grating having 600 lines per mm is illuminated normally by light of wovelength 600 Å What is the heghest order of diffraction image that can be seen ?

In a spectrometer experiment, monochromatic light is incident normally on a diffraction grating having 4.5xx10^5 lines per metre. The seond order line is seen at an angle of 30^@ to the normal. What is the wavelength of the light?

A planetransmissiongratinghaveing 8000 lines per cm is hevingused at normal incidence. Find the longest wavelength which canbe obscraved in the first order.

A parallel bean of monochromatic light is allowed to incident normally on a plane transmission grating having 5000 lines per centimeter. A second order spectral line is found to be diffracted at an angle 30^(@) . Find the wavelength of the light. Data : N=5000 lines/cm =5000xx10^(2) lines/m, m=2 , theta=30^(@) , lambda=?

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 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?