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# Test: Reflection of Light

## 20 Questions MCQ Test General Science(Prelims) by IRS Divey Sethi | Test: Reflection of Light

Description
This mock test of Test: Reflection of Light for UPSC helps you for every UPSC entrance exam. This contains 20 Multiple Choice Questions for UPSC Test: Reflection of Light (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Reflection of Light quiz give you a good mix of easy questions and tough questions. UPSC students definitely take this Test: Reflection of Light exercise for a better result in the exam. You can find other Test: Reflection of Light extra questions, long questions & short questions for UPSC on EduRev as well by searching above.
QUESTION: 1

### Raj is standing in front of a plane mirror. The distance between Raj and his image is 100cm. If the distance between the mirror and image is x. What could be the possible value of x ?

Solution:

Distance between raj and image=100cm
Distance between image mirror =x
Distance between image and mirror= Distance between mirror and raj
x+x=100
2x=100
x=50cm

QUESTION: 2

### Virtual image forms

Solution:

A virtual image occurs when light rays do not actually meet at the image. Instead, you " See" the image because your eye projects light rays backward. In flat, or plane mirrors, the image isa virtual image, and is the same distance behind the mirror as the object is in front of the mirror.

QUESTION: 3

### Which among the following is not true for a plane mirror ?

Solution:

The image formed by a plane mirror is always virtual,upright, and of the same shape and size as the object it is reflecting. A virtual image is a copy of an object formed at the location from which the light rays appear to come.

QUESTION: 4

The focal length of a plane mirror is

Solution:

The focal length of a plane mirror is infinity as the image can be formed at an infinite distance inside the mirror.

QUESTION: 5

The image formed by plane mirror is

Solution:

The image formed by a plane mirror is always virtual (meaning that the light rays do not actually come from the image), upright, and of the same shape and size as the object it is reflecting. A virtual image is a copy of an object formed at the location from which the light rays appear to come.

QUESTION: 6

An observer moves towards a stationary plane mirror at a speed of 4m/s. The speed of image with respect to mirror is __________.

Solution:

As the observer comes closer to the plane mirror, the image also comes closer. Also, in case of plane mirror, object distance = image distance. Hence, the speed of the image w.r.t. mirror is also 4 m/s, towards the mirror.

QUESTION: 7 is the lateral inversion of

Solution:

Lateral inversion is a phenomenon in which left appears to be right and vice versa. It is due to direction that light follows when it strikes a reflecting surface, generally a mirror.

QUESTION: 8

Which of the following letter does not show lateral inversion ?

Solution:

Lateral version of I is I

QUESTION: 9

A medium through which light propagates easily is a

Solution:

In the field of optics, transparency (also called pellucidity or diaphaneity) is the physical property of allowing light to pass through the material without being scattered.

QUESTION: 10

Virtual image

Solution:

A virtual image is defined as the opposite of a real image, therefore an image that cannot be obtained on a screen is reffered to as a virtual image. The rays of light that form a virtual image never converge therefore a virtual image can never be projected onto a screen.

QUESTION: 11

Real image

Solution:

A real image occurs where rays converge, whereas a virtual image occurs where rays only appear to converge. Real images can be produced by concave mirrors and converging lenses, only if the object is placed further away from the mirror/lens than the focal point and this real image is inverted.

QUESTION: 12

What will be the angle of reflection if light falls normally on the reflecting surface?

Solution:

For a plane mirror: If the incident ray falls along the normal, the angle of incidence is 0 degrees, NOT 90 degrees. The angle is measured with the normal to the mirror and not with the plane of the mirror. Hence the angle of reflection is equal to 0 degrees.

QUESTION: 13

Angle of incidence is

Solution:

Angle of incidence is the angle which an incident line or ray makes with a perpendicular to the surface at the point of incidence.

QUESTION: 14

Angle of reflection is

Solution:

Angle of reflection is the angle between ghe reflected ray and the normal angle of incidence is the angle between the incident ray and the normal always angle of incidence =angle of reflection

QUESTION: 15

Which of the following letter shows lateral inversion ?

Solution:

Letter L shows lateral inversion

QUESTION: 16

Rahul is standing in front of a plane mirror. The distance between Rahul and his image is 150cm. If Rahul’s distance from the mirror is x. What could be the possible value of x ?

Solution:

x = 75 cm, as for a plane mirror the distance between the object and the mirror is equal to the distance between the mirror and image.

QUESTION: 17

Light always travels along a

Solution:

Light follows rectilinear motion. It travels in straight line. A light wave can be considered to travel from one point to another along a straight line joining them.

QUESTION: 18

Harry is standing in front of a plane mirror at a distance of 6 m. His image on the other side will form at a distance of

Solution:

For reflection through a plane mirror, Image distance (v) = Object distance (u) = 6 m

QUESTION: 19

In a lateral inversion

Solution:

The left and right of a mirror image appear reversed ( lateral inversion) because of how we perceive the mirror image. The phenomenon where your left appears as the right and vice versa in a mirror is reffered to as lateral inversion.

QUESTION: 20

Which among the following is true for a plane mirror ?

Solution:

The normal line divides the angle between the incident ray and the reflected ray into two equal angles. The angle between the incident ray and the normal is known as the angle of incidence. The angle between the reflected ray and the normal is known as the angle of reflection.