Ray Optics Test

Result

Ray Optics Test - 142

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Weekly Quiz Competition

Question 1
4 / -1

A thin prism of angle 15° made of glass of refractive index µ₁ = 1.5 is combined with another prism of glass of refractive index µ₂= 1.75. The combination of the prisms produces dispersion without deviation. The angle of the second prism should be

A
12°

B
5°

C
7°

D
10°

Solution
Question 2
4 / -1

A ray of light is incident at an angle of incidence i, on one face of a prism of angle A (assumed to be small) and emerges normally from the opposite face. If the refractive index of the prism is µ the angle of incidence i, is nearly equal to

A

B

C

D
Question 3
4 / -1

Identify the wrong description of the below figures

A
1 represents far-sightedness

B
2 correction for short sightedness

C
3 represents for-sightedness

D
4 correction for far-sightedness
Question 4
4 / -1

Ability of the eye to see objects at all distances is called

A
Binocular vision

B
Myopia

C
Hypermetropia

D
Accommodation
Question 5
4 / -1

Lens used to remove long sightedness (hypermetropia) is

A
Concave lens

B
Plano-concave lens

C
Convexo-concave lens

D
Convex lens

Solution
Question 6
4 / -1

Astigmatism (for a human eye) can be removed by using

A
Concave lens

B
Convex lens

C
Cylindrical lens

D
Prismatic lens
Question 7
4 / -1

Circular part in the centre of retina is called

A
Blind spot

B
Yellow spot

C
Red spot

D
None of these

Solution
Question 8
4 / -1

If there had been one eye of the man, then

A
Image of the object would have been inverted

B
Visible region would have decreased

C
Image would have not been seen three dimensional

D
both (b) and (c)
Question 9
4 / -1

A person cannot see distinctly at the distance less than one metre. Calculate the power of the lens that he should use to read a book at a distance of 25 cm

A
+3.0 D

B
+ 0.125 D

C
–3.0 D

D
+4.0 D

Solution
Question 10
4 / -1

How should people wearing spectacles work with a microscope

A
They cannot use the microscope at all

B
They should keep on wearing their spectacles

C
They should take off spectacles

D
(b) and (c) is both way

Solution