- Twinkling of stars is caused by atmospheric effects on starlight. - Refraction of light due to variations in atmospheric density and temperature is the primary cause.
The stars twinkle because of
Asked in WBCS Main Paper 4 2021 · Topic: Optics (Reflection and Refraction at plane and spherical surfaces)
More Physics questions
- The blueness of the sky is mainly due to
- Laws of reflection are applied :
- If the angle between an incident ray and a reflected ray is 44°, then double of angle between the reflected ray and the normal on the reflecting surface will be :
- A spherical mirror and a thin spherical lens have a focal length of +25cm each (in new Cartesian sign convention). The mirror and lens are likely to be -
- A ray of light passes from medium X to another medium Y. If no refraction occurs then the angle between incident light and surface of medium Y should
- Convex mirror is used for
- If two plane mirrors are kept perpendicular to each other, then the number of images of an object placed between them will be
- In an art gallery an artefact is placed between two parallel plain mirrors. The number of its images formed will be :