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Light
Form of energy travels at speed of 2.99×10^8
Reflection
Bouncing of Light from surface of object
Diffuse Reflection
When light strikes a non-smooth surface; reflected light scattered in all directions
Regular Reflection
If surface that light strikes is silvered + polished smooth then reflected as as single beam
Normal
Line/Vector perpendicular to a surface
1st Law of Light Reflection
Incident Ray, Normal at Incidence, Reflected Ray all lie on the same plane
2nd Law of Light Reflection
Angle of Incidence = Angle of Reflection (i=r)
Virtual Image
Image formed by the apparent intersection of Rays; can’t be formed on a screen
Lateral Inversion
Image of right hand in a plane mirror is a left hand
Parallax
Apparent movement of one object relative to another due to the motion of the observer. The object which is further away appears to move with the observer
Concave; Ray strikes pole
Ray reflected back on the other side of the axis with refl ang = inc ang
Concave; Ray passes through Centre of Curvature
Reflected back along its own path
Concave; Ray parallel to axis
Ray passes through focus after reflection
Concave; Ray that passes through focus
Ray comes out parallel to axis
Real Image
Image formed by actual intersection of rays; can be formed on a screen.
Real Image; Concave; Where is source? How looks?
Object’s outside focus, Image is inverted + in front of mirror
Virtual Image; Concave; Where is source? How looks?
Object inside/at focus, Image upright/erect, magnified + behind mirror
Convex; Ray strikes pole
Reflected at equal angle w axis
Convex; Ray heading for centre of curvature
Reflected back along its own path
Convex; Ray heading for fuces
Reflected parallel to axis
Convex Image Nature
Virtual, Upright, Diminished, Behind Mirror
