Q1/10: Two coherent sources have intensities in the ratio 25:16. The ratio of maximum to minimum intensity in their interference pattern is:

Q2/10: The phase difference between the incident and the reflected wave when reflection occurs at a denser medium is:

Q3/10: Diffraction effects are more pronounced when the size of the obstacle or aperture is:

Q4/10: In a single-slit diffraction experiment, the first minimum for red light (660 nm) falls at the first maximum of another wavelength X. What is X?

Q5/10: Unpolarized light is incident on a plane glass surface at the Brewster angle. What is the angle between the reflected and refracted rays?

Q6/10: Assertion: In Young's double-slit experiment, the fringe width for dark fringes is different from that for bright fringes. Reason: In YDSE, the fringes are produced by the superposition of two waves.

Q7/10: The shape of the wavefront originating from a point source is:

Q8/10: The condition for obtaining a secondary maximum in the diffraction pattern due to a single slit is (where a is slit width):

Q9/10: If the two slits in Young's experiment are illuminated by two different sodium lamps emitting light of the same wavelength, the interference pattern will:

Q10/10: A beam of ordinary light is incident on a polaroid, and the transmitted light is passed through another polaroid. If the intensity is reduced to 25% of original, the angle between them is:

Q1/10: Who discovered the photoelectric effect?

Q2/10: The minimum energy required by an electron to just escape from the metal surface is called:

Q3/10: In the photoelectric effect, the number of photoelectrons emitted per second is proportional to:

Q4/10: The de Broglie wavelength associated with a particle of momentum 'p' is given by:

Q5/10: According to Einstein's photoelectric equation, the maximum kinetic energy of photoelectrons depends linearly on:

Q6/10: The rest mass of a photon is:

Q7/10: If the kinetic energy of a free electron doubles, its de Broglie wavelength changes by the factor:

Q8/10: Two metals A and B have work functions 2 eV and 4 eV respectively. Which metal has a lower threshold wavelength?