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प्रश्न
Answer the following.
Name some sources of light that are not hot.
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उत्तर
Moon, jugnu.
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संबंधित प्रश्न
Fill in the blank.
Moon is a .................. body.
How does light make an object visible?
What is a transparent medium? Give two examples.
From among the following objects, list out the opaque, translucent, and transparent bodies in the space provided below:
A glass strip, an ordinary paper, greased paper, tracing paper, polythene sheet, wooden piece, steel plate, glycerine, kerosene oil, mustard oil, grounded glass, stone, book, water, and milk.
Opaque Transparent Translucent
Fill in the blank
A ............. is formed when the path of light is obstructed by an ..............
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) Draw ray diagrams to show how the image is formed using a concave mirror, when the position of object is:
- at C
- between C and F
- between F and P of the mirror.
b) Mention the position and nature of image in each case.
Velocity of light is greater in denser medium than in rarer medium
