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प्रश्न
Write true or false
The stars have no light.
विकल्प
True
False
उत्तर
False
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संबंधित प्रश्न
Match the following
| (a). A light ray passes from air to glass | (1) . speeds up |
| (b). A light ray passes from glass to water | (2). reflects red light |
| (c). Virtual image | (3). primary colours |
| (d). Red rose | (4). plane mirror |
| (e). Red, green, and blue | (5). slows down |
Select the correct alternative.
The luminous body is
Fill in the blank
The Sun and .............. are the natural sources of light.
Answer the following.
List four natural sources of light.
Answer the following.
Distinguish between transparent, translucent, and opaque objects.
Speed of light in air is 3 × 108 m s–1 and the refractive index of a medium is 1.5. Find the speed of light in the medium.
A ray of light passes from one medium to another medium. Refraction takes place when angle of incidence is ______.
State whether true or false. If false, correct the statement.
If a ray of light passes obliquely from one medium to another, it does not suffer any deviation.
In going from a rarer to denser medium, the ray of light bends ______.
Boojho and Paheli were given one mirror each by their teacher. Boojho found his image to be erect and of the same size whereas Paheli found her image erect and smaller in size. This means that the mirrors of Boojho and Paheli are, respectively
