Twinkling of stars is caused by atmospheric refraction. As starlight passes through different layers of the Earth's atmosphere with varying densities and temperatures, it undergoes repeated refraction in random directions, causing the apparent position and brightness of the star to fluctuate.
Twinkling of stars is primarily due to the atmospheric
Asked in UPSC NDA 2 2021 · Topic: Optics (Reflection and Refraction at plane and spherical surfaces)
More Physics questions
- Spherical mirror formula relating an object distance 'u', image distance 'v' and focal length of mirror 'f' may be applied to a plane mirror when
- The image of an object formed by a plane mirror is
- The refractive index of crown glass is close to 3/2. If the speed of light in air is c, then the speed of light in the crown glass will be close to
- Sita, 1·5 m high, stands before a plane mirror fixed on a wall to view her full image. What should be the minimum height of the plane mirror so that Sita can view her image fully ?
- A point object is placed at the centre of curvature of a spherical concave mirror. Which one among the following would be the correct location of image formed ?
- We observe objects around us due to _________ to :
- What happens when light travels from air to glass ?
- Light travels at a maximum speed in :