Ray Optics-Resolving Power of Microscopes and Astronomical Telescopes (NEET Physics): Questions 9 - 10 of 10

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Question number: 9

» Ray Optics » Resolving Power of Microscopes and Astronomical Telescopes

MCQ▾

Question

In a compound microscope the objective and the eye-piece have focal lengths of 0.95 cm and 5 cm respectively, and are kept at a distance of 20 cm. The last image is formed at a distance of 25 cm from the eye-piece. Calculate the total magnification.

Choices

Choice (4) Response

a.

75

b.

94

c.

84

d.

88

Question number: 10

» Ray Optics » Resolving Power of Microscopes and Astronomical Telescopes

MCQ▾

Question

What should be the size of the aperture of the objective of telescope which can just resolve the two stars of angular width of 10 -3 degree by light of wavelength 5000Å?

Choices

Choice (4) Response

a.

3.5 cm

b.

3.5 mm

c.

3.5 m

d.

3.5 km

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