Advertisements
Advertisements
प्रश्न
When a low flying aircraft passes overhead, we sometimes notice a slight shaking of the picture on our TV screen. Suggest a possible explanation.
Advertisements
उत्तर
Weak radar signals sent by a low flying aircraft can interfere with the TV signals received by the antenna. As a result, the TV signals may get distorted. Hence, when a low flying aircraft passes overhead, we sometimes notice a slight shaking of the picture on our TV screen.
संबंधित प्रश्न
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.
Why does an unpolarised light incident on a polaroid get linearly polarised ?
Show, via a suitable diagram, how unpolarised light can be polarised by reflection.
A ray of light passes from a vacuum to a medium of refractive index (μ). The angle of
incidence is found to be twice the angle of refraction. The angle of incidence is _______.
A) `cos^(-1)(mu/2)`
B) cos−1(μ)
C) `2 cos^(-1) (mu/2)`
D) `2 sin^(-1) (mu/2)`
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 ray of light is incident on a transparent medium at a polarizing angle. What is the angle between the reflected ray and the refracted ray?
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.
The transverse nature of light is shown in ______.
What is plane polarised light?
List the uses of polaroids.
State Brewster’s law.
What is the angle of polarisation and obtain the equation for an angle of polarisation?
Discuss about pile of plates.
What is double refraction?
A plane mirror produces a magnification of
