Ray Optics Test

Result

Ray Optics Test - 113

Score
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Weekly Quiz Competition

Question 1
4 / -1

Three lenses L₁, L₂, L₃ are placed co-axially as shown infigure. Focal length\'s of lenses are given 30 cm, 10 cm and 5 cm respectively. If a parallel beam of light falling on lens L₁ emerging L₃ as a convergent beam such that it converges at the focus of L₃. Distance between L₁ and L₂ will be

A
40 cm

B
30 cm

C
20 cm

D
10 cm

Solution
Question 2
4 / -1

An object is placed at a point distant x from the focus of a convex lens and its image is formed at I as shown in the figure. The distances x, x\' satisfy the relation

A

B

C

D

Solution
Question 3
4 / -1

The diameter of the eye-ball of a normal eye is about 2.5 cm. The power of the eye lens varies from

A
2 D to 10 D

B
40 D to 32 D

C
9 D to 8 D

D
44 D to 40 D

Solution
Question 4
4 / -1

In a thin spherical fish bowl of radius 10 cm filled with water of refractive index 4/3 there is a small fish at a distance of 4 cm from the centre C as shown in figure. Where will the image of fish appear, if seen from E

A
5.2 cm

B
7.2 cm

C
4.2 cm

D
3.2 cm

Solution
Question 5
4 / -1

A
A distance of 0.2 m from the water surface

B
A distance of 0.6 m from the water surface

C
A distance of 0.3 m from the water surface

D
The same location of fish

Solution
Question 6
4 / -1

A water drop in air refractes the light ray as

A

B

C

D

Solution
Question 7
4 / -1

Which of the following ray diagram show physically possible refraction

A
(i)

B
(ii)

C
(iii)

D
None of the above

Solution
Question 8
4 / -1

Following figure shows the multiple reflections of a light ray along a glass corridor where the walls are either parallel or perpendicular to one another. If the angle of incidence at point P is 30°, what are the angles of reflection of the light ray at points Q R, S and T respectively

A
30^o,30^o,30^o,30^o

B
30^o, 60^o,30^o, 60^o

C
30^o, 60^o, 60^o,30^o

D
60^o, 60^o, 60^o, 60^o

Solution
Question 9
4 / -1

When the rectangular metal tank is filled to the top with an unknown liquid, as observer with eyes level with the top of the tank can just see the corner E; a ray that refracts towards the observer at the top surface of the liquid is shown. The refractive index of the liquid will be

A
1.2

B
1.4

C
1.6

D
1.9

Solution
Question 10
4 / -1

A

B

C

D