NCERT Solutions for class 10 Science chapter 10: Light- Reflection and Refraction

NCERT Solutions for Class 10 Science Chapter 10 Light – Reflection and Refraction are provided in this article. It comprises all the important definitions, concepts, and methodologies that will be really beneficial for the students. The important topics that are included in this chapter are:

Reflection of light by curved surfaces
Images formed by spherical mirrors
Refraction
Refractive index
Refraction of light by spherical lens

Expected no. of Questions: 2-3 questions of around 6 marks.

Download PDF: NCERT Solutions for Class 10 Science Chapter 10 Light – Reflection and Refraction

NCERT Solutions for Class 10 Science Chapter 10

Class 10 Science Chapter 10 Light – Reflection and Refraction: Important Topics

Reflection is the bouncing back of light when it strikes a smooth surface. Refraction is the bending of light rays when it travels from one medium to another. Nature Of Surface. Generally occurs on shinny surfaces that only allow rebounding of light without permitting penetration through it.

Laws of Reflection of Light

There are two laws of reflection of light, that are:

First Law of Reflection: According to this law, the reflected ray and the incidental ray all lie on the same plane.
Second Law of Reflection: This law states that the angle of reflection and the angle of the incident are always going to be equal.

Reflection of Light by Curved Surfaces

When the reflecting surface is instead curved, it is called a curved mirror. There are two types of curved mirrors; concave and convex mirrors. Concave mirrors are curved mirrors whose reflecting surfaces curve inwards while those whose reflecting surfaces bulge outwards are called convex mirrors. Curved mirrors generally form images when two rays intersect or appear to intersect.

Refractive Index

Refractive Index or Index of Refraction is a value calculated from the ratio of the speed of light in a vacuum to that in a second medium of greater density. The refractive index variable is most commonly represented by the letter n or n' in descriptive text and mathematical equations.

Chapter Related Links:

Refraction of Light	Reflection of Light	Lens Formula and Magnification
Light	Power of a Lens	Refraction and Refractive Index
Convex Mirror	Difference Between Concave and Convex Mirror	Plane Mirror

Science Study Guides:

Biology	Difference between in Biology
Biology MCQs	Class 10 Science Notes

CBSE X Related Questions

1.
Assertion (A): Reflex actions do not involve thinking.
Reason (R): Most reflex actions are controlled by the spinal cord.

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

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2.
The reasons for excessive generation of wastes are:
(i) Use and throw policy.
(ii) Increased availability of packaged food.
(iii) Increased construction wastes.
(iv) Non-sorting of dry and wet wastes

(i), (iii) and (iv)
(i), (ii) and (iii)
(i), (ii), (iii) and (iv)
(ii), (iii) and (iv)

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3.
(a) Study the given electric circuit in which 2 A electric current is flowing between points X and Y.

(i) Using the battery, key, voltmeter and ammeter in this given electric circuit, redraw a circuit diagram in which 2 \(\Omega\) and 4 \(\Omega\) resistors are connected between X and Y in parallel combination.
(ii) Circuit drawn by you, in which resistors are connected in parallel combination, calculate the electric current flowing through 4 \(\Omega\) resistor.

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4.
Which of the plant hormones are responsible for the following processes? Promote cell division Inhibition of growth Detection of light Wilting of leaves

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5.
Sex is determined by different factors in various species. However, in human beings, it is determined genetically. Which amongst the following option(s) is/are correct for human beings ?
Gamete carrying X chromosome from female parent.
Gamete carrying X chromosome from male parent.
Gamete carrying Y chromosome from male parent.

(ii) and (iii)
(i) only
(i) and (iii)
(iii) only

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6.
How does the change in curvature of the eye lens help us in the process of seeing the nearby objects clearly?

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NCERT Solutions for class 10 Science chapter 10: Light- Reflection and Refraction

NCERT Solutions for Class 10 Science Chapter 10