Assertion & Reason Test: Light- Reflection & Refraction - Class 10 MCQ

# Assertion & Reason Test: Light- Reflection & Refraction - Class 10 MCQ

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## 15 Questions MCQ Test - Assertion & Reason Test: Light- Reflection & Refraction

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

### Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): The focal length of the convex mirror will increase, if the mirror is placed in water.Reason (R): The focal length of a convex mirror of radius R is equal to, f = R/2.

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 1
Focal length of the spherical mirror does not depend on the medium in which it is placed.
Assertion & Reason Test: Light- Reflection & Refraction - Question 2

### Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): An object is placed at a distance of f from a convex mirror of focal length f, its image will form at infinity.Reason (R): The distance of image in convex mirror can never be infinity.

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 2
The distance of image in convex mirror is always finite.
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Assertion & Reason Test: Light- Reflection & Refraction - Question 3

### Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): If the rays are diverging after emerging from a lens; the lens must be concave.Reason (R): The ST lens can give diverging rays.

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 3
If the rays crossing focal point of convex lens, become diverging.
Assertion & Reason Test: Light- Reflection & Refraction - Question 4

Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : A point object is placed at a distance of 26 cm from a convex mirror of focal length 26 cm. The image will not form at infinity.

Reason : For above given system the equation 1/u + 1/v = 1/f gives v = ∞

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 4
Assertion (A) is true but reason (R) is false.
Assertion & Reason Test: Light- Reflection & Refraction - Question 5

Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : If both plane mirror and object are moved through a distance x , then the image moves through a distance 2x .

Reason : When the object is fixed and plane mirror is moved through a distance x . Then the image is also moves through the distance 2x .

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 5
Assertion (A) is true but reason (R) is false.
Assertion & Reason Test: Light- Reflection & Refraction - Question 6

Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : Large concave mirrors are used to concentrate sunlight to produce heat in solar cookers.

Reason : Concave mirror converges the light rays falling on it to a point.

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 6
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A). Concave mirror converges the light rays falling on it to a point. So large concave mirrors are used to concentrate sunlight to produce heat in solar cookers.
Assertion & Reason Test: Light- Reflection & Refraction - Question 7

Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : If the rays are diverging after emerging from a lens; the lens must be concave.

Reason : The convex lens can give diverging rays.

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 7
Assertion (A) is false but reason (R) is true If the rays cross focal point of convex lens, they become diverging.
Assertion & Reason Test: Light- Reflection & Refraction - Question 8

Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : A ray of light incident along the normal to the plane mirror retraces its path after reflection from the mirror.

Reason : A ray of light along the normal has angle of incidence as π /2 and hence, it retraces its own path after reflection from mirror.

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 8
Assertion (A) is true but reason (R) is false. Angle of incidence = Angle between incident ray normal to the mirror = 00
Assertion & Reason Test: Light- Reflection & Refraction - Question 9

Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : Refractive index has no units.

Reason : The refractive index is a ratio of two similar quantities.

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 9
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Assertion & Reason Test: Light- Reflection & Refraction - Question 10

Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : When a concave mirror is held under water, its focal length will increase.

Reason : The focal length of a concave mirror is independent of the medium in which it is placed.

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 10
Assertion (A) is false but reason (R) is true. Focal length is the property of mirror and is independent of the medium in which it is placed.
Assertion & Reason Test: Light- Reflection & Refraction - Question 11

Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : If both object and plane mirror are moved through a distance x , then the image moves through a distance 2x .

Reason : If object is fixed and plane mirror is moved through a distance x then the image also moves through a distance 2x .

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 11
Assertion (A) is true but reason (R) is false.
Assertion & Reason Test: Light- Reflection & Refraction - Question 12

Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : Red light travels faster in glass than green light.

Reason : The refractive index of glass is less for red light than for green light.

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 12
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Assertion & Reason Test: Light- Reflection & Refraction - Question 13

Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : The image formed by a concave mirror is certainly real if the object is virtual.

Reason : The image formed by a concave mirror is certainly virtual if the object is real.

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 13
Assertion (A) is true but reason (R) is false The image of real object may be real in case of concave mirror.
Assertion & Reason Test: Light- Reflection & Refraction - Question 14

Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : A convex mirror is used as a driver’s mirror.

Reason : Convex mirrors have a wider field of view as they are curved outwards. They also give an erect, though diminished image.

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 14
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Assertion & Reason Test: Light- Reflection & Refraction - Question 15

Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion : As light travels from one medium to another, the frequency of light does not change.

Reason : Because frequency is the characteristic of source.

Detailed Solution for Assertion & Reason Test: Light- Reflection & Refraction - Question 15
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
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