intro Flashcards
Light
Light is a form of energy which creates sensation of vision in us
Optics
It is a branch of physics which deals with study of properties of light
2 branches of optics
Ray Optics
Wave Optics
Light ray
The straight line path followed by light between two close points is known as a light ray
parallel beam of light
(draw)
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convergent beam of light
(draw)
divergent beam of light
(draw)
light possesses _____________ nature
light possesses dual nature i.e. particle like nature and wave like nature
Properties of light (6)
- rectilinear propagation
- reflection
- refraction
- interference
- diffraction
- polarization (X)
Object
The point of intersection of the incident light rays is known as object
Real Object
- if the intersection of the incident light rays is real then it is known as real object
- real objects are formed due to divergent incident beams
Virtual Object
- The apparent intersection of the incident light rays is known as virtual object
- virtual object is formed due to convergent incident beams
Image
the point of intersection of reflected/refracted light rays is known as image
Real Image
- If the intersection of reflected/refracted light rays is real then it is known as real image
- real images are formed due to convergent reflected/refracted rays
Virtual Image
- The apparent intersection of reflected/refracted light rays is known as virtual image
- virtual images are formed due to divergent reflected/refracted rays