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Fill in the blanks : The size of the pu...

Fill in the blanks : The size of the pupil become …………….when you see in dim light..

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Fill in the blanks The size of pupil becomes………… when you in dim light .

When the light is bright, the pupil becomes…. .

Fill in the blanks: The size of a molecule is very…………..as compared to the distance between them.

Fill in the blanks: We see colour with the help of .... cells while vision in dim light depends on ...... cells of the retina.

Fill in the blanks: The activity of enzyme inhibtied when modualtors bind to it is known as .......................... inhibition.

Fill in the blanks spaces If the side of the square is halved then its perimeter becomes __________

Fill in the blank spaces. If the side of the square is doubled then its area becomes ________ times.

PSEB-LIGHT-EXERCISE
  1. State the laws of reflection.

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  2. Describe an activity to show that the incident ray , the reflected ray...

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  3. Fill in the blanks : A person 1m in front of a plane mirror seems to...

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  4. Fill in the blanks : If you touch your …………….. Ear with right hand i...

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  5. Fill in the blanks : The size of the pupil become …………….when you see ...

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  6. Fill in the blanks : Night birds have …………….cons than rods in their ...

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  7. Angle of incidence is equal to the angle of reflection.

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  8. Image formed by a plane mirror is :-

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  9. Describe the construction of a kaleidoscope.

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  10. Draw a labelled sketch of the human eye.

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  11. Gurmit wanted to perform activity 16.8 using a laser torch . Her teach...

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  12. Explain how can you take care of your eyes .

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  13. What is the angle of incidence of a ray if the reflected ray is at an ...

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  14. How many images of a candle will be formed if it is placed between two...

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  15. Two mirrors meet at right angles . A ray of light is incident on one a...

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  16. Boojho stands at A just on the side of a plane mirror as shown in the ...

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  17. Find out the position of the image of an object situated at A in the p...

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  18. Can Paheli at B see this image ?

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  19. Can Boojho at C see this image ?

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  20. When Paheli moves from B to C ,where does the image of A move ?

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