EASY
Upper Secondary: IGCSE
IMPORTANT
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Write an equation relating the refractive index of a material to the speed of light in vacuum and the speed of light in the material.

Important Questions on Light

EASY
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 13 - Light>End-of-chapter questions>Q 4
Here is the equation for Snell's law: n=sinisinr. Copy the equation and state what the symbols n,i,r stands for.
EASY
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 13 - Light>End-of-chapter questions>Q 5
Draw a diagram to show how a ray of light is refracted when it strikes the internal surface of piece of glass at an angle smaller than the critical angle. Label incident, refracted and reflected rays.
EASY
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 13 - Light>End-of-chapter questions>Q 6
Draw a diagram to show how a converging lens causes parallel rays of light to be focussed. 
EASY
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 13 - Light>End-of-chapter questions>Q 8
The law of reflection says that : "When a ray of light is reflected at a surface, the angle of incidence is equal to the angle of reflection". Draw a diagram to indicate how a ray of light is reflected by a flat mirror, and mark the two angles mentioned in the law.