Optical Instruments

Optical Instruments

12th Grade

10 Qs

quiz-placeholder

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Optical Instruments

Optical Instruments

Assessment

Quiz

Physics

12th Grade

Medium

Created by

ELIZABETH THOMAS

Used 18+ times

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

To increase the angular magnification of a simple microscope, one should increase:

the focal length of the lens

the power of the lens

the aperture of the lens

the object size

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

An optical instrument used for magnification has power 25 D of objective and 20 D of eyepiece. Whether it is a microscope or a telescope?

Microscope

Telescope

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The eyepiece of an astronomical telescope has a focal length of 10 cm. The telescope is focused for normal vision of distant objects when the tube length is 1 m. The focal length of the objective is:

20 cm

10 cm

90 cm

100 cm

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

If the focal length of the objective lens is increased then,

Magnifying power of microscope will increase but that of telescope will decrease

Magnifying power of microscope and telescope both will increase

Magnifying power of microscope and telescope both will decrease

Magnifying power of microscope will decrease but that of telescope will increase

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The magnification produced by the objective lens and the eye lens of a compound microscope are 25 and 6 respectively. The magnifying power of this microscope is:

19

31

150

120

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The objective of a compound microscope is essentially:

A concave lens of small focal length and small aperture

Convex lens of small focal length and large aperture

Convex lens of large focal length and large aperture

Convex lens of small focal length and small aperture

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A compound microscope has two lenses. The magnifying power of one is 5 and the combined magnifying power is 100. The magnifying power of the other lens is:

10

20

50

25

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