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State two uses of a plane mirror....

State two uses of a plane mirror.

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State two uses of a cathode ray tube.

State one advantage of using a total reflecting prism as a reflector in place of a plane mirror.

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ICSE-LIGHT ENERGY-TEST YOURSELF (SHORT/LONG ANSWER TYPE QUESTIONS)
  1. What is irregular reflection ? Give an example.

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  2. How do we see objects around us?

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  3. State two uses of a plane mirror.

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  4. Can light travel in vacuum ?

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  5. The speed of light in air is :

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  6. State the speed of light in glass

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  7. State whether light slows down or speeds up in the following cases : ...

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  8. State whether light slows down or speeds up in the following cases : ...

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  9. State whether light slows down or speeds up in the following cases : ...

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  10. What are primary colours ? Name the three primary colours.

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  11. What are secondary colours ? Name the three secondary colours.

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  12. Fill in the blanks with the appropriate colour : Blue +.............

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  13. Fill in the blanks with the appropriate colour : Red + Blue + .......

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  14. Fill in the blanks with the appropriate colour : Red + Blue = .....

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  15. Fill in the blanks with the appropriate colour : Green + Red = .....

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  16. The leaves appear green when seen in white light. Give a reason.

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  17. A rose appears red in white light. How will it appear in green light ?...

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  18. A rose appears red in white light. How will it appear in red light ? ...

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  19. Why does a piece of paper appear white in sunlight ? How would you exp...

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  20. A piece of paper appears black in sunlight. What will be its colour wh...

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