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The lens in human eye is a ..............

The lens in human eye is a ...........

A

convex mirror

B

convex lens

C

concave mirror

D

concave lens

Text Solution

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The correct Answer is:
B
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A star which can be seen with naked eye fro Earth has intensity 1.6xx10^(-9)Wm^(-2) on Earth.If the corresponding wavelength is 560 nm,and the radius of the lens of human eye is 2.5xx10^(-3) m,the number of photons entering in our eye in 1s is…….

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KUMAR PRAKASHAN-THE HUMAN EYE AND THE COLOURFUL WORLD-OBJECTIVE QUESTIONS AND ANSWERS (Choose the correct option)
  1. When the ciliary muscles contract, the eye lens becomes ......... and ...

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  2. The rainbow on the moon …

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  3. In dispersion of white light due to a triangular glass prism, the devi...

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  4. Which lens from the following, should a person suffering from near-sig...

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  5. Which lens is used by a person suffering from far-sightedness?

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  6. Which of the following is true for near sightedness?

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  7. Which of the following is true for far- sightedness?

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  8. Where is the image formed in the eye of a person suffering from far si...

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  9. A person has a defect of eye vision. His near point is 40 cm. It means...

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  10. A person has a defect of vision. His far point is 1.5 m. It means...

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  11. Out of the following, which light is deviated minimum in the dispersio...

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  12. Which light has maximum speed in glass?

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  13. Which ray of light is present exactly at the middle of the spectrum ob...

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  14. The lens in human eye is a ...........

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  15. For persons suffering from near-sightedness the power of the lens used...

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  16. For a person suffering from .......... the power of the lens used in s...

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  17. Which phenomenon/phenomena of light is / are involved in the formation...

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  18. ......... light from the following is least scattered by fog, dust and...

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  19. Which of the following controls the amount of light entering into the ...

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  20. The refractive index of glass is maximum for…………. light.

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