Polaroids at an Angle
Trending Questions
Q. Plane polarized light is incident on an analyser. The intensity then becomes three fourth. The angle of the axis of the analyser with the polarization axis of beam is:
- 30∘
- 45∘
- 60∘
- Zero
Q. Light from a point source falls on a screen. If the separation between the source and the screen is increased by 1%, the illuminance will decrease (nearly) by
(a) 0.5%
(b) 1%
(c) 2%
(d) 4%
(a) 0.5%
(b) 1%
(c) 2%
(d) 4%
Q.
A beam of unpolarised light passes through a tourmaline crystal A and then it passes through a tourmaline crystal B oriented so that its principal plane is parallel to that of A. the intensity of emergent light is I0. Now B is rotated by 45∘ about the ray. The emergent light will have intensity:
- I02
- I0√2
- √2I0
- 2I0
Q. A thin paper of thickness 0⋅02 mm having a refractive index 1⋅45 is pasted across one of the slits in a Young's double slit experiment. The paper transmits 4/9 of the light energy falling on it. (a) Find the ratio of the maximum intensity to the minimum intensity in the fringe pattern. (b) How many fringes will cross through the centre if an identical paper piece is pasted on the other slit also? The wavelength of the light used is 600 nm.
Q. Two light sources of intensities 8 cd and 12 cd are placed on the same side of a photometer screen at a distance of 40 cm from it. Where should a 80 cd source be placed to balance the illuminance?
Q. Unpolarised light of intensity 32Wm−2 passes through three polarisers such that the transmission axis of the last polarizer is perpendicular to that of the first. At what angle will the transmitted intensity be maximum?
- 15∘
- 30∘
- 45∘
- 60∘
Q. Unpolarised light of intensity 32Wm−2 passes through three polarisers such that the transmission axis of the last polarizer is perpendicular to that of the first. At what angle will the transmitted intensity be maximum?
- 15∘
- 30∘
- 45∘
- 60∘
