Twinkling of stars in clear sky during nighttime can be explained with

The twinkling of a star is due to :

When a CD (compact disc used in audio and video systems) is seen in sunlight, rainbow-like colours is seen. This can be explained on the basis of the phenomenon of :

The minimum distance of clear vision for a normal healthy eye of human being is supposed to be :

Consider the following statements: 1. Size of the sun at dusk 2. Colour of the sun at dawn 3. Moon being visible at dawn 4. Twinkle of stars in the sky 5. Polestar being visible in the sky Which of t…

The defect of vision in which a person cannot see the distant objects clearly but can see nearby objects clearly is called