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In compound microscope, the focal length and aperture of the objective used is respectively

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Important Questions on Ray Optics

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Physics Crash Course NDA & NA EE>Chapter 21 - Ray Optics>Exercise 1>Q 51
The human eye has a lens which has a:
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Physics Crash Course NDA & NA EE>Chapter 21 - Ray Optics>Exercise 1>Q 52
Your friend is having eye sight problem. She is not able to see clearly a distant uniform window mesh and it appears to her as nonuniform and distorted. The doctor diagnosed the problem as :
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Physics Crash Course NDA & NA EE>Chapter 21 - Ray Optics>Exercise 1>Q 53
An astronomical telescope has an eyepiece of focal length 5 cm. The angular magnification in normal adjustment is 10. When the final image is at least at a distance of distinct vision (25 cm) from eye piece, then angular magnification will be
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Physics Crash Course NDA & NA EE>Chapter 21 - Ray Optics>Exercise 1>Q 54
The minimum magnifying power of telescope is M. If the focal length of its eye lens is halved, the magnifying power will become
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Physics Crash Course NDA & NA EE>Chapter 21 - Ray Optics>Exercise 1>Q 55
A simple microscope has a focal length of 5 cm. The magnification at the least distance of distinct vision is-
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Physics Crash Course NDA & NA EE>Chapter 21 - Ray Optics>Exercise 1>Q 56
A Galileo telescope has an objective of focal length 100 cm and magnifying power 50. The distance between the two lenses in normal adjustment will be
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Physics Crash Course NDA & NA EE>Chapter 21 - Ray Optics>Exercise 1>Q 57
The objective lens of a telescope has a diameter of 12.2 cm. The angular resolution of the telescope at the wavelength of 500 nm is
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IMPORTANT
Physics Crash Course NDA & NA EE>Chapter 21 - Ray Optics>Exercise 1>Q 58
The magnifying power of a telescope can be increased by