Advertisements
Advertisements
प्रश्न
The glass plate of refractive index 1.732 is to be used as a polarizer, its polarising angle is _______.
पर्याय
30°
45°
60°
90°
Advertisements
उत्तर
60°
APPEARS IN
संबंधित प्रश्न
What is a Polaroid?
If the critical angle of a medium is sin-1(3/5), find the polarising angle.
Three identical polaroid sheets P1, P2 and P3 are oriented so that the pass axis of P2 and P3 are inclined at angles of 60° and 90° respectively with the pass axis of P1. A monochromatic source S of unpolarised light of intensity I0 is kept in front of the polaroid sheet P1 as shown in the figure. Determine the intensities of light as observed by the observer at O, when polaroid P3 is rotated with respect to P2 at angles θ = 30° and 60°.
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?
Using the phenomenon of polarisation, show how the transverse nature of light can be demonstrated.
Show, via a suitable diagram, how unpolarised light can be polarised by reflection.
Two polaroids P1 and P2 are placed with their pass axes perpendicular to each other. Unpolarised light of intensity I0 is incident on P1. A third polaroid P3 is kept in between P1 and P2 such that its pass axis makes an angle of 60° with that of P1. Determine the intensity of light transmitted through P1, P2 and P3.
What is the Brewster angle for air to glass transition? (Refractive index of glass = 1.5)
When a low flying aircraft passes overhead, we sometimes notice a slight shaking of the picture on our TV screen. Suggest a possible explanation.
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)
What is the value of refractive index of a medium of polarising angle 60°?
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.
What is the difference between polarised light and unpolarised light?
Greenlight is an 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.
Light transmitted by Nicol prism is ______.
The transverse nature of light is shown in ______.
What is plane polarised light?
What is unpolarised light?
State and obtain Malus’ law.
What is the angle of polarisation and obtain the equation for an angle of polarisation?
Discuss about pile of plates.
How is polarisation of light obtained by scattering of light?
The reflected light is found to be plane polarised when an unpolarized light falls on a denser medium at 60° with the normal. Find the angle of refraction and critical angle of incidence for total internal reflection in the denser to rarer medium reflection.
Which of the following phenomena is not common to sound and light waves?
Can reflection result in plane polarised light if the light is incident on the interface from the side with higher refractive index?
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.
To ensure almost 100 per cent transmissivity, photographic lenses are often coated with a thin layer of dielectric material. The refractive index of this material is intermediated between that of air and glass (which makes the optical element of the lens). A typically used dielectric film is MgF2 (n = 1.38). What should the thickness of the film be so that at the center of the visible spectrum (5500 Å) there is maximum transmission.
