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What is focal length and power of a rect...

What is focal length and power of a rectangular glass slab ?

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The focal length will be infinity and hence, power will be zero.
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MODERN PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS-Revision Exercises (Very Short Answer Questions)
  1. Under what condition will the object and image always be on the same s...

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  2. An image of an object is formed by using a convex lens. If the orienta...

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  3. What is focal length and power of a rectangular glass slab ?

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  4. Two convex lenses of focal length 10 cm each are combined. What will b...

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  5. Speed of light in glass is 2 xx 10^8 m//s. Refractive index of glass i...

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  6. What do you mean by angle of prism ?

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  7. List the factors on which the angle of deviation through a prism depen...

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  8. Which colour deviates (i) most (ii) least on passing through a prism ?

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  9. The sparkle of a diamond can be explained by which phenomenon of light...

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  10. What do you mean by pure spectrum ?

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  11. In the spectrum of white light through the prism, which colour is seen...

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  12. An equilateral prism is made of made of material of refractive index s...

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  13. Write the relation between angle of prism, angle of incidence and angl...

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  14. What is dispersion of light ?

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  15. On what factors does the dispersive power of a prism depend ?

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  16. When does a ray passing through a prism deviate away from the base of ...

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  17. What are the steps for the formation of a primary rainbow ?

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  18. Name the optical phenomenon due to which the sky appears blue.

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  19. How does the angle of minimum deviation of a glass prism vary, if the...

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  20. What is power of accommodation of a human eye ?

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