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प्रश्न
Write true or false
The stars have no light.
विकल्प
True
False
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उत्तर
False
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संबंधित प्रश्न
Write true or false of the following statement.
A shadow is formed because light travels in a straight-line path.
What do we call an electric bulb producing light?
What is a transparent medium? Give two examples.
What do you understand by candle power?
Tick the correct answer.
Substance which don’t allow light to pass through them,
Fill in the blank
There are ........... and man-made ............ of light.
Answer the following.
What is meant by luminous intensity? What is one lumen?
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.
State Rayleigh’s law of scattering.
Observe the picture given in the following figure carefully.
A patch of light is obtained at B, when the torch is lighted as shown. Which of the following is kept at position A to get this patch of light?
