Ray Optics Test

Result

Ray Optics Test - 147

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Weekly Quiz Competition

Question 1
4 / -1

An electron microscope is superior to an optical microscope in

A
Having better resolving power

B
Being easy to handle

C
Low cost

D
Quickness of observation

Solution
Question 2
4 / -1

The magnifying power of a microscope with an objective of 5 mm focal length is 400. The length of its tube is 20 cm. Then the focal length of the eye-piece is

A
200 cm

B
160 cm

C
2.5 cm

D
0.1cm

Solution
Question 3
4 / -1

When the object is self-luminous, the resolving power of a microscope is given by the expression

A

B

C

D
Question 4
4 / -1

The power of two convex lenses A and B are 8 dioptres and 4 dioptres respectively. If they are to be used as a simple microscope, the magnification of

A
B will be greater than A

B
A will be greater than B

C
The information is incomplete

D
None of the above

Solution
Question 5
4 / -1

A person using a lens as a simple microscope sees an

A
Inverted virtual image

B
Inverted real magnified image

C
Upright virtual image

D
Upright real magnified image
Question 6
4 / -1

Resolving power of a microscope depends upon

A
Wavelength of light used, directly

B
Wavelength of light used, inversely

C
Frequency of light used

D
Focal length of objective

Solution
Question 7
4 / -1

In a compound microscope, the focal lengths of two lenses are 1.5 cm and 6.25 cm. An object is placed at 2 cm form objective and the final image is formed at 25 cm from eye lens. The distance between the two lenses is

A
6.00 cm

B
7.75 cm

C
9.25 cm

D
11.00 cm

Solution
Question 8
4 / -1

A wire mesh consisting of very small squares is viewed at a distance of 8 cm through a magnifying converging lens of focal length 10 cm, kept close to the eye. The magnification produced by the lens is

A
5

B
8

C
10

D
20

Solution
Question 9
4 / -1

The magnifying power of a simple microscope is 6. The focal length of its lens in metres will be, if least distance of distinct vision is 25 cm

A
0.05

B
0.06

C
0.25

D
0.12

Solution
Question 10
4 / -1

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

A
10

B
20

C
50

D
25

Solution