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Device used to see very very small objec...

Device used to see very very small object is _________ .

A

Simple microscope

B

Compound microscope

C

Telescope

D

Mirror

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The correct Answer is:
B
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a. The far point of a myopic person is 80cm in front of the eye. What is the power of the lens required to enable him to see very distant object clearly ? b. In what way does the corrective lens help the above person ? Does the lens magnify very distant objects? Explain carefully. c. The above person profers to remove his spectacles while reading a book Explain why.

SURA PUBLICATION-OPTICS-ADDITIONAL QUESTIONS & ANSWER (Choose the Correct Answer)
  1. In a simple microscope to obtain higher magnification, the focal lengt...

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  2. The image formed by an objective of a compound microscope is

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  3. Device used to see very very small object is .

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  4. In compound microscope, lenses are used.

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  5. Image formed in simple microscope is .

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  6. Objective lens of telescope is of .

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  7. Presbyobia is corrected by .

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  8. To increase the magnification of the telescope, the focal length of th...

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  9. Among visible light, has the lowest wavelength.

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  10. The second law of refraction is also known as .

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  11. is an optical instrument used to see distant objects.

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  12. The speed of light in vaccum is ms^(-1).

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  13. Light is characterized by and frequency.

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  14. The ratio of speed of light in vaccum to the speed of light medium is ...

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  15. lenses are used as eye lens of 'Galilean Telescope'

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  16. Power of accommodation is achieved by changing the of the eye lens.

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  17. The refractive index of a medium is dependent on the .

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  18. scattering is responsible for the white appearance of the clouds.

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  19. The spectral lines having frequency equal to the incident ray frequenc...

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  20. If one of the focus of a bi-covnex lens is plane, it is known as a .

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