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P.43. Why can the image of the building be seen inside the plane mirror ?. P.43. P.43. Object. Object can be seen. Light ray from the object enter the eye. ( Directly or indirectly ). P.43. Emit their own light. Luminous objects. P.43. P.43. Can be seen when light
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P.43 Why can the image of the building be seen inside the plane mirror ?
P.43 Object Object can be seen Light rayfrom the object enter the eye. (Directly or indirectly)
P.43 Emit their own light Luminous objects
P.43 Can be seen when light is reflected from luminous objects Non-luminous objects
P.43 Line along which light energy is transferred Light travels in straight line Light ray
P.43 Cone of light Pencil of light Light beam
P.43 Incident ray Reflected ray Refracted ray
P.43 Incident ray Reflected ray Refracted ray Transparent object
P.43 Incident ray Reflected ray Refracted ray Opaque object
P.43 Reflection Black All the light is absorbed
P.43 Absorption White All the light is reflected
P.43 Ray box
P.43 0o Normal Angle of reflection Angle of incidence Experiment : Laws of reflection
P.43 What is the relation between i & r ?
P.43 Normal Incident ray Reflected ray r i Plane mirror
P.43 i = r Incident ray, reflected ray &normallie on the same plane Laws of reflection
P.43 Q1(a) What is r ? 60o 60o 30o 30o
P.43 Q1(b) What is r ? 55o 35o 35o 55o
P.44 Q2 45o 45o 45o 45o 45o 45o
P.44 Q2 20o 60o 70o 50o 40o 40o 50o
P.44 Q2 40o 20o
5o 5o 85o 65o 25o P.44 Q2(b) 65o 30o
P.44 Q2(c) 45o 45o 45o 45o 45o 45o 45o
70o 20o 60o P.44 Q5 10o
P.45 Smooth surface
P.45 Regular reflection
P.45 Rough surface Light rays are scattered
P.45 Diffuse reflection
P.45 Copy the shape of the object Image Light rays
P.45 Image is formed on the screen Real image
P.45 Image is formed behind the screen Virtual image
P.45 Converge at the position of the image Real image Light rays pass through the real image Real image can be formed on the screen
P.45 Diverge from the position of the image Virtual image Light rays do not pass through the real image Virtual image cannot be formed on the screen