If wavelength of light = `lambda`, width of aperture = a , then which one would show more distinct diffraction pattern among the following?
(i) When a = 5`lambda` ( ii) When a = 3`lambda`, and
(iii) When a `approx lambda`

Wavelengths of microwave, ultraviolet and infrared rays are lambda_m,lambda_n and lambda_i , respectively. Which one of the following is correct?

If a light of wavelength lambda falling on a single slit of width a diffracts at an angle theta , the condition of first minima will be

If a light of wavelength lambda falling on a sibgle slit of width 'a diffracts at an angle theta , the condition of first minima will b

What should be the change of angular width of central maximum in a single slit diffraction pattern when visible light of lower wavelength is used. Give explanation for each case.

The width of a narrow slit is a. Establish the condition of formation of first minima of the diffraction fringes, produced by illuminating the slit with a light of wavelength lambda .

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 parallel beam of light of lambda = 5 xx 10^(-7) m is incident normally on a narrow slit of width 0.2 mm. The diffraction pattern is observed on a screen at the focal plane of a convex lens of f = 50 cm. Find the distance between the first two minima and the first two maxima on the screen.

A parallel beam of light of wavelength lambda is incident normally on a single slit of width d. Diffraction bands are obtained on a screen placed at a distance D from the slit. The second dark band from the central bright band will be at a distance given by

The Tyndall effect is observed only when the conditions are satisfied (i) the diameter of dispersed particle is much smaller than the wavelength of the light used (ii) the diameter of the dispersed particle is not much smaller than the wavelength of the light used (iii) the refractive indices of the dispersed phase and the dispersion medium are almost similar in magnitude (iv) the refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitude