Home › UP Board Class 12 › Waves & Oscillations › Brewster's angle for a glass of refractive index…
Brewster's angle for a glass of refractive index $\sqrt{3}$ (relative to air) is:
A$30^\circ$
B$45^\circ$
C$60^\circ$
D$90^\circ$
Answer & Solution
Correct answer: C. $60^\circ$
Brewster's law: $\tan i_B = \mu$. With $\mu = \sqrt{3}$, $\tan i_B = \sqrt{3} \Rightarrow i_B = 60^\circ$. At this angle the reflected light is completely plane-polarised, with the electric field perpendicular to the plane of incidence.
Related questions
If a source emits sound of frequency 500 Hz and moves at 20 m/s toward a stationary observNewton's formula for the speed of sound in air (assuming isothermal process) predicted a vFor a longitudinal wave in air, the excess pressure and displacement are related such thatThe wave equation y = 0.05 sin(20πx − 100πt) SI units. The wave speed isThe fundamental frequency of a vibrating string of length L, tension T, linear density μ iTwo waves overlap to produce a standing wave on a string. The nodes are points whereThe speed of light in vacuum isWhen a wave is reflected from a rigid boundary (fixed end of a string), the reflected wave