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Light: Reflection And Refraction, Test 1 - Class 10 MCQ


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10 Questions MCQ Test - Light: Reflection And Refraction, Test 1

Light: Reflection And Refraction, Test 1 for Class 10 2024 is part of Class 10 preparation. The Light: Reflection And Refraction, Test 1 questions and answers have been prepared according to the Class 10 exam syllabus.The Light: Reflection And Refraction, Test 1 MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Light: Reflection And Refraction, Test 1 below.
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Light: Reflection And Refraction, Test 1 - Question 1

The speed of light in vacuum is 

Detailed Solution for Light: Reflection And Refraction, Test 1 - Question 1

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

Light: Reflection And Refraction, Test 1 - Question 2

According to laws of reflection

 

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Light: Reflection And Refraction, Test 1 - Question 3

Focal length of plane mirror is

Light: Reflection And Refraction, Test 1 - Question 4

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

Light: Reflection And Refraction, Test 1 - 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

Detailed Solution for Light: Reflection And Refraction, Test 1 - Question 5

 

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.

Light: Reflection And Refraction, Test 1 - 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.

Detailed Solution for Light: Reflection And Refraction, Test 1 - Question 6

m = v/u = 36/9 = 4

Light: Reflection And Refraction, Test 1 - Question 7

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

Detailed Solution for Light: Reflection And Refraction, Test 1 - Question 7

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

Light: Reflection And Refraction, Test 1 - Question 8

In the case of a convex mirror, if the object is moved away from the mirror, how does the size of image change?

Detailed Solution for Light: Reflection And Refraction, Test 1 - Question 8

Size of the image decreases.
As the object is moved away from a convex mirror, the distance of virtual image (formed behind the mirror) from the mirror increases (between pole and focus), the image shifts from the pole towards the focus and the size of the image gradually decreases. When the object is at infinity, the image is at its focus. The image always becomes erect and virtual.

Light: Reflection And Refraction, Test 1 - Question 9

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

Detailed Solution for Light: Reflection And Refraction, Test 1 - Question 9

Magnification ,M = hi/hu = 10/5 = 2

Light: Reflection And Refraction, Test 1 - Question 10

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

Detailed Solution for Light: Reflection And Refraction, Test 1 - Question 10

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

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