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# Ray Optics - Compulsory Test

## 30 Questions MCQ Test | Ray Optics - Compulsory Test

Description
This mock test of Ray Optics - Compulsory Test for Class 10 helps you for every Class 10 entrance exam. This contains 30 Multiple Choice Questions for Class 10 Ray Optics - Compulsory Test (mcq) to study with solutions a complete question bank. The solved questions answers in this Ray Optics - Compulsory Test quiz give you a good mix of easy questions and tough questions. Class 10 students definitely take this Ray Optics - Compulsory Test exercise for a better result in the exam. You can find other Ray Optics - Compulsory Test extra questions, long questions & short questions for Class 10 on EduRev as well by searching above.
QUESTION: 1

Solution:
QUESTION: 2

Solution:
QUESTION: 3

### The angle of reflection is the angle between

Solution:
QUESTION: 4

An object is placed at the centre of curvature of a concave mirror. The distance between its image and the pole is

Solution: If an object is placed on centre of curvature then its image will also form on centre of curvature. And we know that R=2f.Radius of curvature is equal to twice of focal length. So its option c is correct.
QUESTION: 5

An object of size 2.0 cm is placed perpendicular to the principal axis of a concave mirror. The distance of the object from the mirror equals the radius of curvature. The size of the image will be

Solution:
QUESTION: 6

The variation of focal length to form a sharp image on retina is called

Solution:
QUESTION: 7

A point object is placed on the principal axis of a spherical mirror. The object-distance u is

Solution:

As the object is always placed on the left of the mirror and distances on the left of the mirror are taken as negative. Therefore object distance is definitely negative.

QUESTION: 8

f =  R/2 is valid

Solution:
QUESTION: 9

Find the focal length of the mirror that forms an image 6.2 cm behind the mirror of an object placed at 26 cm in front of the mirror?

Solution:
QUESTION: 10

If an incident ray passes through the centre of curvature of a spherical mirror, the reflected ray will

Solution:
QUESTION: 11

To get an image larger than the object, one can use

Solution:
QUESTION: 12

A ray of light travelling in air falls obliquely on the surface of a calm pond. It will

Solution:
QUESTION: 13

A ray of light goes from a medium of refractive index μ1 to a medium of refractive index μ2. The angle of incidence is i and the angle of refraction is r. Then, sin i/sin r is equal to

Solution:
QUESTION: 14

A thin lens and a spherical mirror have a focal length of + 15 cm each.

Solution:
QUESTION: 15

A convex lens

Solution:
QUESTION: 16

A convex lens forms a virtual image when an object is placed at a distance of 18 cm from it. The focal length must be

Solution:
QUESTION: 17

An object is placed before a convex lens. The image formed

Solution:
QUESTION: 18

An object is placed before a concave lens. The image formed

Solution:
QUESTION: 19

A lens has a power of +0.5 D. It is

Solution:
QUESTION: 20

Which of the following can be used to form a virtual image of an object?

I. convex lens

II. concave lens

III. concave mirror

Solution:
QUESTION: 21

Which of the following conditions are necessary for total internal reflection to take place at the boundary of two optical media?

Solution:
QUESTION: 22

The speed of light in vacuum is 3.0 × 108 m/s. If the refractive index of a transparent liquid is 4/3, then the speed of light in the liquid is

Solution:
QUESTION: 23

The refractive indices of water and glass are 4/3 and 3/2 respectively. The refractive index of water with respect to glass is

Solution:
QUESTION: 24

The mirage is formed due to:

Solution:
QUESTION: 25

A glass prism has refractive index 1.5 and the refracting angle 90° If a ray falls on it at an angle of incidence of 30°, then the angle of emergence will be

Solution:
QUESTION: 26

Speed of light in water is

Solution:
QUESTION: 27

Refractive index of glass w.r.t. air is 3/2. What is the refractie index of air w.r.t glass?

Solution:
QUESTION: 28

A concave mirror of focal length 10 cm produces an image five times as large as the object. If the image is in front of the mirror, the distance of the object from the mirror will be

Solution:
QUESTION: 29

To form an image twice the size of the object, using a convex lens of focal length 20 cm, the object distance must be –

Solution:
QUESTION: 30

The magnification of an object placed 10 cm from a convex mirror of radius of curvature 20 cm will be

Solution: