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:

When light is incident on a diffraction grating, the zero order principal maximum will be

When light is incident on a diffraction grating, the zero order principal maximum will be

A beam of monochromatic light of wavelength lambda falls normally on a diffraction grating of line spacing d. If theta is the angle between the second-order diffracted beam and the direction of the incident light, what is the value of sin theta ?

A beam of monochromatic light of wavelength lambda falls normally on a diffraction grating of line spacing d. If theta is the angle between the second-order diffracted beam and the direction of the incident light, what is the value of sin theta ?

A beam of monochromatic light of wavelength lambda falls normally on a diffraction grating of line spacing d. If theta is the angle between the second-order diffracted beam and the direction of the incident light, what is the value of sin theta ?

For a parallel beam of monochromatic light of wavelength lambda diffraction is produced by a single slit whose width 'a' is of the order of the wavelength of the light. If 'D' is the distance of the screen from the slit, the width of the central maxima will be:

For a parallel beam of monochromatic light of wavelength lambda , diffraction is produced by a single slit whose width a is of the order of the wavelength of the light. If D is the distance of the screen from the slit, the width of the central maxima will be

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 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.