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Cambridge IGCSE
Physics
Revision Guide 2024
Unit 3 Part 2
Mohammed Ali
[Physics with Mo Ali]
Cambridge IGCSE Physics Revision Guide by Mo Ali – Unit 3 – Part 2
, 2
Reflection of Light
1 Define and use the terms normal, angle of incidence and angle of reflection
2 Describe the formation of an optical image by a plane mirror, and give its characteristics, i.e. same size, same
distance from mirror, virtual
3 State that for reflection, the angle of incidence is equal to the angle of reflection; recall and use this relationship
4 Use simple constructions, measurements and calculations for reflection by plane mirrors
Define normal: perpendicular line to the reflecting surface
Define angle of incidence: angle between the incident ray and the normal
Define angle of reflection: angle between the reflected ray and the normal
Law of Reflection: angle of incidence (i) = angle of reflection (r)
Characteristics of images formed by an image in a mirror:
1. Same size as object
2. Same distance from the mirror
3. Virtual (image cannot be seen on a screen
4. Laterally inverted (left and right reversed)
Ray diagram to form a reflected image:
Cambridge IGCSE Physics Revision Guide by Mo Ali – Unit 3 – Part 2
Cambridge IGCSE
Physics
Revision Guide 2024
Unit 3 Part 2
Mohammed Ali
[Physics with Mo Ali]
Cambridge IGCSE Physics Revision Guide by Mo Ali – Unit 3 – Part 2
, 2
Reflection of Light
1 Define and use the terms normal, angle of incidence and angle of reflection
2 Describe the formation of an optical image by a plane mirror, and give its characteristics, i.e. same size, same
distance from mirror, virtual
3 State that for reflection, the angle of incidence is equal to the angle of reflection; recall and use this relationship
4 Use simple constructions, measurements and calculations for reflection by plane mirrors
Define normal: perpendicular line to the reflecting surface
Define angle of incidence: angle between the incident ray and the normal
Define angle of reflection: angle between the reflected ray and the normal
Law of Reflection: angle of incidence (i) = angle of reflection (r)
Characteristics of images formed by an image in a mirror:
1. Same size as object
2. Same distance from the mirror
3. Virtual (image cannot be seen on a screen
4. Laterally inverted (left and right reversed)
Ray diagram to form a reflected image:
Cambridge IGCSE Physics Revision Guide by Mo Ali – Unit 3 – Part 2
