Advertisements
Advertisements
Question
What is the Brewster angle for air to glass transition? (Refractive index of glass = 1.5)
Solution
Refractive index of glass, μ = 1.5
Brewster angle = θ
Brewster angle is related to refractive index as:
tan θ = μ
θ = tan−1 (1.5) = 56.31°
Therefore, the Brewster angle for air to glass transition is 56.31°.
APPEARS IN
RELATED QUESTIONS
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.
What dose a polaroid consist of?
Find an expression for intensity of transmitted light when a polaroid sheet is rotated between two crossed polaroids. In which position of the polaroid sheet will the transmitted intensity be maximum?
How does one demonstrate, using a suitable diagram, that unpolarised light when passed through a Polaroid gets polarised?
Show, via a suitable diagram, how unpolarised light can be polarised by reflection.
The refractive indices of glass and water w.r.t. air are 3/2 and 4/3 respectively. Determine the refractive index of glass w.r.t. water.
The refractive indices of water for red and violet colours are 1.325 and 1.334 respectively.
Find the difference between the velocities of rays for these two colours in water. (c = 3 × 108 m/s)
State any two methods by which ordinary light can be polarised
Green light is incident at the polarising angle on a certain transparent medium. The angle of refraction is 30° . Find
(i) polarising angle, and
(ii) refractive index of the medium.
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.
The transverse nature of light is shown in ______.
What is polarisation?
What is plane polarised light?
What is unpolarised light?
State and obtain Malus’ law.
Discuss about pile of plates.
How is polarisation of light obtained by scattering of light?
What is normal focusing?
An unpolarised light of intensity 32 Wm-2 passes through three Polaroids such that the axes of the first and the last Polaroids are at 90°. What is the angle between the axes of the first and middle Polaroids so that the emerging light has an intensity of only 3 Wm-2?
