Free Printable Refraction of Light

1.

From the figure answer the question

What is the power of the lens?

a)

- 0.025 D

b)

- 2.5 D

c)

+ 0.025 D

d)

+ 2.5 D

2.

From the figure answer the following question.

If an object is placed at a distance of 15cm from the lens, what will be the size and nature of the image?

a)

Real and Diminished

b)

Virtual and diminished

c)

Real and Magnified

d)

Virtual and magnified

3.

The figure shows the refraction of light in the eye. What kind of defect of the eye is indicated in the figure

a)

Myopia

b)

Night blindness

c)

Hypermetropia

d)

Retinal Detachment

4.

From the figure determine the refractive index of medium b with respect to a, where a is air medium.

a)

0.5

b)

1.33

c)

1.5

d)

2

5.

From the figure determine the power of the lens

a)

- 0.02D

b)

+ 0.5D

c)

- 5D

d)

+ 5D

6.

To see the object placed more than 50cm away from a person who cannot see the distant object distinctly -

i) need a lens which is the same type of the stem

ii) need a lens of more power than that of given in the stem

iii) need a lens of power - 2D

Which one is correct?

a)

i and ii

b)

i and iii

c)

ii and iii

d)

i, ii and iii

7.

According to the figure
$When\ r=60\degree,\ which\ one\ is\ correct?$

a)

$i\ =\ 70\degree$

b)

$i\ <\ r$

c)

$i\ =\ \theta_c$

d)

$i\ =\ 60\degree$

8.

In which condition, the ray will come back in the media of glass?

a)

$\theta_{c\ }<\ 90\degree$

b)

$i\ >\ \theta_c$

c)

$i\ =\ 90\degree$

d)

$i\ >\ 90\degree$

9.

What will be the refractive index, if the critical angle of the medium is $45\degree$ with respect to air?

a)

0.58

b)

0.71

c)

1.41

d)

1.73

10.

Which lens is used for the treatment of myopia?

a)

Concave

b)

Convex

c)

Plane

d)

Plane Concave

Refraction of Light

Total questions: 10

Worksheet time: 5mins

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