Скачать или смотреть Light reflection and refraction class 10 Notes

[11/10, 10:22 am] Meta AI: Here's a concise summary of Light Reflection and Refraction for Class 10:

Light Reflection

Definition: Change in direction of light when it hits a surface and bounces back.

Types:

1. Specular Reflection (Mirror-like)
2. Diffuse Reflection (Scattered)

Laws of Reflection:

1. Angle of Incidence = Angle of Reflection
2. Incident ray, reflected ray, and normal are in the same plane

Light Refraction

Definition: Change in direction of light as it passes from one medium to
[11/10, 10:22 am] Meta AI: Here's a concise summary of Light Reflection and Refraction for Class 10:

Light Reflection

Definition: Change in direction of light when it hits a surface and bounces back.

Types:

1. Specular Reflection (Mirror-like)
2. Diffuse Reflection (Scattered)

Laws of Reflection:

1. Angle of Incidence = Angle of Reflection
2. Incident ray, reflected ray, and normal are in the same plane

Light Refraction

Definition: Change in direction of light as it passes from one medium to another.

Causes:

1. Change in speed
2. Change in direction

Laws of Refraction (Snell's Law):

1. n1 sin(θ1) = n2 sin(θ2)
n1, n2: refractive indices of media
θ1, θ2: angles of incidence and refraction

Refraction Phenomena:

1. Bending of light
2. Total Internal Reflection
3. Dispersion (splitting of light)

Key Terms:

1. Incident ray
2. Reflected ray
3. Refracted ray
4. Normal
5. Angle of incidence
6. Angle of reflection
7. Angle of refraction
8. Refractive index

*Important Formulas:


1. Reflection angle = Arcsin (n1 sin(θ1) / n2)
2. Refraction angle = Arcsin (n2 sin(θ2) / n1)
3. Critical angle = Arcsin (n2 / n1)

*Solved Examples:



1. Find the reflection angle if angle of incidence is 30°.
2. A light ray passes from air to glass. Find the refraction angle.

*Practice Questions:



1. What is the difference between specular and diffuse reflection?
2. A light ray passes from water to air. Find the refraction angle.
3. Calculate the critical angle for a light ray passing from glass to air.

Do you need help with specific questions or concepts? #class10