मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

When a low flying aircraft passes overhead, we sometimes notice a slight shaking of the picture on our TV screen. Suggest a possible explanation. - Physics

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.

टीपा लिहा
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.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?

व्हिडिओ ट्यूटोरियलVIEW ALL [3]

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.


Show, with the help of a diagram, how unpolarised sunlight gets polarised due to scattering.


Using the phenomenon of polarisation, show how the transverse nature of light can be demonstrated.


What is the value of refractive index of a medium of polarising angle 60°?


With the help of an experiment, state how will you identify whether a given beam of light is polarised or unpolarized?


What does a polaroid consist of? How does it produce a linearly polarised light?


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?


Explain how an unpolarised light gets polarised when incident on the interface separating the two transparent media.


Light transmitted by Nicol prism is ______.


Discuss polarisation by selective absorption.


What is a polariser?


What is a analyser?


What is unpolarised light?


What is partially polarised light?


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?


Polarisation of light is the only phenomenon that establishes ______.


For the same objective, find the ratio of the least separation between two points to be distinguished by a microscope for light of 5000 Å and electrons accelerated through 100 V used as the illuminating substance.


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.


The intensity of transmitted light when a polaroid sheet, placed between two crossed polaroids at 22.5° from the polarization axis of one of the polaroids, is (I0 is the intensity or polarised light after passing through the first polaroid):


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×