Physics Light MCQ

interference minima are perfectly dark and that of diffraction may not be dark
the fringe width is same for diffraction fringes but not for interference fringes
interference cannot be observed with white light
the intensities for interference fringes is constant but not for diffraction fringes

Answer

924 × 10^-6 rad
108 × 10^-6 rad
270 × 10^-6 rad
540 × 10^-6 rad

Answer

should be of same order as the wavelength
should be much larger than the wavelength
is independent of wavelength
should be half of the wavelength

Answer

change in angle of reflection with change in wavelength
change in angle of diffraction with respect to change in wavelength
change in angle of refraction with change in wavelength
change in angle of incidence with change in wavelength

Answer

limited by the wavelength of light
limited by the refractive index of the glass of the lens
limited by the diameter of the objective lens
independent of all three

Answer