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प्रश्न
Amount of light entering into the eye is controlled by ______.
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उत्तर
Amount of light entering into the eye is controlled by Iris.
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संबंधित प्रश्न
Fill in the blank.
Moon is a .................. body.
Name a few living things which emit light.
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.
List four natural sources of light.
________ objects allow all the light to pass through them.
Light is a form of ______.
Choose the translucent substance from the following
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.
