A diffraction pattern is obtained by using a beam of red light. What will happen if the red light is replaced by the blue light. a. No change will take place. b. Bands become broader and farther apart. c. Bands disappear d. Diffraction bands become narrower and crowded.

In a double slit interference pattern, the first maxima for infrared light would be a. at the same place as the first maxima for green light b. closer to the centre than the first maxima for green light c. farther from the centre than the first maxima for green light d. infrared light does not produce an interference pattern

Polarization of light proves the : a. corpuscular nature of light b. quantum nature of light c. Transverse wave nature of light d. Longitudinal wave nature of light

Polaroid glasses is used in sun glasses because : a. It reduces the light intensity to half on account of polarization b. It is fashionable c. It has good colour d. It is cheaper

The penetration of light into the region of geometrical shadow is known as a. Interference of light b. Diffraction of light c. Refraction of light d. Polarization of light

To observe diffraction, the size of the obstacle a. should beX/2, where X is the wavelength. b. should be of the order of wavelength. c. has no relation to wavelength. d. should be much larger than the wavelength

What happens to the interference pattern, the two slits S1 and S2 in Young’s double slit experiment are illuminated by two independent but identical sources? a. The intensity of the bright fringes doubled b. The intensity of the bright fringes becomes four times c. Two sets of interference fringes overlap d. No interference pattern is observed.

When a polaroid is rotated, the intensity of light varies but never reduces to zero. It shows that theincident light is: a. Unpolarised b. completely plane polarised c. partially plane polarised d. one of the above

When interference of light takes place (a) energy is created in the region of maximum intensity (b) energy is destroyed in the region of maximum intensity (c) conservation of energy holds good and energy is redistributed (d) conservation of energy does not hold good

Which of the following is conserved when light waves interefere? a. Energy b.Phase c. Intensity d. Amplitude

A young’s double slit experiment uses a monochromatic source. The shape of interference fringes formed on a screen is : a. Parabola b. straight line c. circle d. Hyperbola

Angular width of central maxima of a single slit diffraction pattern is independent of a. Slit width b. Frequency of the light used c. Wavelength of the light used d. Distance between slit and screen

Huygens theory could not explain a. Reflection of light b. Photoelectric effect c. Interference of light d. Diffraction of light

If the 8th bright fringe of light of wavelength \(λ_1\) coincides with the 9th bright fringe of light of the wavelength \(λ_2\) in young’s double experiment, then the possible wavelengths of visible light are (A) 400nm and 450nm (B) 425nm and 400nm (C) 400nm and 425 nm (D) 450nm and 400nm

In an interference experiment, the spacing between successive maxima and minima is (A) λd / D (B) λD / d (C) dD / λ (D) λd / 4D