Light is a form of energy that travels in the form of waves. It behaves in two main ways when it interacts with surfaces: reflection and refraction.
Reflection of Light:
- Reflection is the bouncing back of light from a surface.
- Law of Reflection: Angle of incidence = Angle of reflection.
- Example: Mirror reflects light to form an image.
Refraction of Light:
- Refraction is the bending of light when it passes from one medium to another.
- The amount of bending depends on the refractive index.
- Example: A straw looks bent in water due to refraction.
Key Differences Between Reflection and Refraction:
- Reflection: Light bounces off a surface.
- Refraction: Light bends when passing through different media.
Practice Questions PDF
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Questions on Light – Reflection and Refraction
Showing 121–126 of 126121.A concave mirror produces three times magnified (enlarged) real image of an object placed at 10 cm in front of it. Where is the image located? 122.Find the focal length of a convex mirror whose radius of curvature is 32 cm. 123.Why do we prefer a convex mirror as a rear-view mirror in vehicles? 124.Name a mirror that can give an erect and enlarged image of an object. 125.The radius of curvature of a spherical mirror is 20 cm. What is its focal length? 126.Define the principal focus of a concave mirror.