Ray Optics Test

Result

Ray Optics Test - 89

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Weekly Quiz Competition

Question 1
4 / -1

In a compound microscope, if the objective produces an image I₀ and the eye piece produces an image I_e then

A
I₀ is virtual but I_e is real

B
I₀ is real but I_e is virtual

C
I₀ and I_e are both real

D
I₀ and I_e are both virtual
Question 2
4 / -1

The head lights of a jeep are 1.2 m apart. If the pupil of the eye of an observer has a diameter of 2 mm and light of wavelength 5896 Å is used, what should be the maximum distance of the jeep from the observer if the two head lights are just separated

A
33.9 km

B
33.9 m

C
3.34 km

D
3.39 m

Solution
Question 3
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 4
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 5
4 / -1

The maximum magnification that can be obtained with a convex lens of focal length 2.5 cm is (the least distance of distinct vision is 25 cm)

A
10

B
0.1

C
62.5

D
11

Solution
Question 6
4 / -1

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

A

B

C

D
Question 7
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 8
4 / -1

A compound microscope has an eye piece of focal length 10 cm and an objective of focal length 4 cm. Calculate the magnification, if an object is kept at a distance of 5 cm from the objective so that final image is formed at the least distance vision (20 cm)

A
12

B
11

C
10

D
13

Solution
Question 9
4 / -1

The working of which of the following is similar to that of a slide projector?

A
Electron microscope

B
Scanning electron microscope

C
Transmission electron microscope

D
Atomic force microscope
Question 10
4 / -1

In order to increase the magnifying power of acompound microscope

A
The focal lengths of the objective and the eye piece should be small

B
Objective should have small focal length and the eye piece large

C
Both should have large focal lengths

D
The objective should have large focal length and eye piece should have small

Solution