Q1
What does the law of reflection state?
AAngle of incidence equals angle of reflection
BAngles are always different
CNo specific relationship
DLight never reflects predictably
SSCClass 9 (SSC)Science and Technology (विज्ञान आणि तंत्रज्ञान)Ch 11 · Topic 1
Reflection of Light
Reflection of light occurs when light bounces off surfaces, and understanding mirrors and their image formation is essential in optics.
Core concept
The law of reflection states the angle of incidence equals the angle of reflection, both measured from the normal.
How it works
A concave mirror can form real or virtual images depending on object position, commonly used in torches and telescopes.
Why it matters
A convex mirror always forms virtual, diminished, upright images, commonly used in vehicle side mirrors for a wider field of view.
Key detail
The mirror formula, 1/v + 1/u = 1/f, relates object distance (u), image distance (v), and focal length (f) for curved mirrors.
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Quick notes
• Law of reflection: angle of incidence = angle of reflection.
• Both measured from normal.
• Concave mirror: real or virtual images.
• Used in torches, telescopes.
• Convex mirror: always virtual, diminished, upright.
• Used in vehicle side mirrors.
• Mirror formula: 1/v + 1/u = 1/f.
• u=object distance, v=image distance, f=focal length.