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# Light: Reflection And Refraction, Test 1

## 10 Questions MCQ Test | Light: Reflection And Refraction, Test 1

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

### The speed of light in vacuum is

Solution:

The speed of light in vacuum is always 3 × 10 m/s.

QUESTION: 2

Solution:
QUESTION: 3

### Focal length of plane mirror is

Solution:
QUESTION: 4

The nature of image formed by concave mirror is always ................. and ................... irrespective of the position of the object.

Solution:
QUESTION: 5

If the image formed by a concave mirror is observed to be virtual, erect and larger than the object then the position of the object will be

Solution:

If the image formed by a concave mirror is virtual, erect and larger than the object, the position of the object should be between the pole of the mirror and its principal focus.

QUESTION: 6

An object is 9 cm from a magnifying lens and its image is formed 36 cm from the lens. Magnification of the lens is.

Solution:

m = v/u = 36/9 = 4

QUESTION: 7

If an object is moved away from a convex mirror, then its image ________ .

Solution:

If an object is moved away from a convex mirror, then its image moves towards the principal focus and becomes smaller in size.

QUESTION: 8

If an object is moved away from a convex mirror, then its image moves towards the principal focus and becomes smaller in size.

Solution:

Since it is a concave lens, image is virtual. Thus, v = -20 cm, u = -30 cm

1/v - 1/u  = 1/f

Put the above quantity in the given formula. You will get the answer.

QUESTION: 9

For one curved mirror, h' = 10 cm, h = 5 cm then its magnification is :

Solution:

Magnification ,M = hi/hu = 10/5 = 2

QUESTION: 10

If the radius of curvature of a spherical mirror is 34.52 cm, then the focal length of that spherical mirror is

Solution:

Relation between the radius of curvature and focal length of spherical mirror is R = 2f

Here, R = 34.52 cm

Or, f = R/2

Or, f = 34.52/2 = 17.26 cm