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Explain the term critical angle with the...

Explain the term critical angle with the aid of a labelled diagram.

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ICSE-REFRACTION OF LIGHT AT PLANE SURFACES-EXERCISE-4(D)
  1. Explain the term critical angle with the aid of a labelled diagram.

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  2. How is the critical angle related to the refractive index of a medium ...

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  3. State the approximate value of the critical angle for (a) glass-air su...

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  4. What is meant by the statement 'the critical angle of diamond is 24^(@...

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  5. A light ray is incident fromt a denser medium on the boundary separati...

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  6. Name two factors which affect the critical angle for a given pair of m...

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  7. The critical angle for glass-air is 45^(@) for the light of yellow col...

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  8. Which colour of light has a higher critical angle? Red light or Green ...

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  9. (a) What is total internal reflection ? (b) State two conditions nec...

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  10. Fill in the blanks: Q: Total internal reflection occurs only when a ...

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  11. Fill in the blanks: Q: Critical angle is the angle of in denser medi...

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  12. State whether the following statement is true or false ? If the angle ...

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  13. The refractive index of air with respect to glass is expressed as ""(g...

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  14. Figure alongside shows two rays A and B travelling from water to air. ...

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  15. Figure shows a point source P inside a water container. Three rays A,B...

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  16. In figure, PQ and PR are the two light rays emerging from an object P....

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  17. The refractive index of glass is 1*5 from a point P inside a glass sla...

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  18. A ray of light enters a glass slab ABCD as shown in figure and strikes...

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  19. What is a total reflecting prism ? State three actions that it can pro...

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  20. Show with the help of a diagram how a total reflecting prism can be us...

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