Q1
What is the law of reflection?
AAngle of incidence equals angle of reflection
BLight always bends
CLight disappears at surfaces
DAngles are always different
ICSEClass 9 (ICSE)PhysicsCh 7 · Topic 1
Reflection of Light
Reflection of light occurs when light bounces off a surface, following specific laws, and is used in mirrors and various optical devices.
Core concept
The laws of reflection state that the angle of incidence equals the angle of reflection, and both rays lie in the same plane as the normal.
How it works
Plane mirrors produce virtual, upright, and same-sized images, while curved mirrors (concave and convex) produce different types of images.
Why it matters
Concave mirrors can form real or virtual images depending on object distance, used in torches, headlights, and telescopes.
Key detail
Convex mirrors always produce virtual, smaller images with a wider field of view, commonly used in vehicle side mirrors.
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Quick notes
• Angle of incidence equals angle of reflection.
• Both rays lie in the same plane as the normal.
• Plane mirrors produce virtual, upright, same-sized images.
• Curved mirrors include concave and convex types.
• Concave mirrors form real or virtual images.
• They're used in torches, headlights, telescopes.
• Convex mirrors always produce virtual, smaller images.
• Convex mirrors are used in vehicle side mirrors.