Advertisements
Advertisements
Question
A ray of ordinary light is travelling in air. It is incident on air glass pair at a polarising angle of 56°. Find the angle of refraction in glass.
Solution
∠ip + ∠r = 90°
∠ip = Angle of polarisation = 56°
∴ ∠r = 90° - 56° = 34°
∴ Angle of refraction is 34°.
APPEARS IN
RELATED QUESTIONS
What is a Polaroid?
With the help of neat diagram, explain how non-polar dielectric material is polarised in external electric field of increasing intensity. Define polarisation in dielectrics.
Unpolarised light is passed through a polaroid P1. When this polarised beam passes through another polaroid P2 and if the pass axis of P2 makes angle θ with the pass axis of P1, then write the expression for the polarised beam passing through P2. Draw a plot showing the variation of intensity when θ varies from 0 to 2π.
State two uses of Polaroid.
The glass plate of refractive index 1.732 is to be used as a polarizer, its polarising angle is _______.
State any two methods by which ordinary light can be polarised
A beam of light is incident at the polarizing angle of 35° on a certain glass plate. The refractive index of the glass plate is :
What is polarisation?
What is a polariser?
Figure shown a two slit arrangement with a source which emits unpolarised light. P is a polariser with axis whose direction is not given. If I0 is the intensity of the principal maxima when no polariser is present, calculate in the present case, the intensity of the principal maxima as well as of the first minima.
