LIGHT
CONTENTS
I. REFLECTION OF LIGHT FROM CURVED SURFACE
II. REFRACTION OF LIGHT BY LENSES
III. REFRACTION OF LIGHT THROUGH PLANE MEDIA
I. REFLECTION OF RIGHT FROM CURVED SURFACE (MIRROR)
MIRROR:
➢ This is a polished surface that forms images by reflection light.
REFLECTION OF LIGHT
➢ This is the bouncing back of light rays when meet with an obstacle.
CATEGORIES/TYPES OF CURVED MIRRORS
❖ Curved mirror is categorized light two types
(i) Concave mirror
(ii) Convex mirror
From the diagrams above, term used in reflection of light are as follows:
1. CONVEX MIRROR
➢ This is the types of mirror where by the reflecting surface is outward.
2. CONCAVE MIRROR
➢ This is the type of mirror where by the reflecting surface is inward.
3. POLE (P)
➢ This is the central point of the reflecting surface of a mirror.
OR
➢ This is the centre of arc forming the curved mirror.
4. RADIUS OF CURVATURE (r)
➢ This is the distance from the pole to the centre of curvature.
5. CENTRE OF CURVATURE (C)
➢ This is the centre of the sphere of which a mirror is a part.
6. PRINCIPAL AXIS
➢ This is the line joining the centre of curvature to the pole of the mirror.
7. FOCAL LENGTH (f)
➢ This is the distance from the pole to the principal focus.
8. PRINCIPAL FOCUS/FOCAL PONT (F)
➢ This is the point on the principal axis where light rays tend to intersect after being reflected.
