intro Flashcards

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1
Q

Light

A

Light is a form of energy which creates sensation of vision in us

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2
Q

Optics

A

It is a branch of physics which deals with study of properties of light

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3
Q

2 branches of optics

A

Ray Optics
Wave Optics

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4
Q

Light ray

A

The straight line path followed by light between two close points is known as a light ray

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5
Q

parallel beam of light

A

(draw)
—-

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6
Q

convergent beam of light

A

(draw)

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7
Q

divergent beam of light

A

(draw)

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8
Q

light possesses _____________ nature

A

light possesses dual nature i.e. particle like nature and wave like nature

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9
Q

Properties of light (6)

A
  • rectilinear propagation
  • reflection
  • refraction
  • interference
  • diffraction
  • polarization (X)
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10
Q

Object

A

The point of intersection of the incident light rays is known as object

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11
Q

Real Object

A
  • 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
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12
Q

Virtual Object

A
  • The apparent intersection of the incident light rays is known as virtual object
  • virtual object is formed due to convergent incident beams
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13
Q

Image

A

the point of intersection of reflected/refracted light rays is known as image

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14
Q

Real Image

A
  • 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
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15
Q

Virtual Image

A
  • The apparent intersection of reflected/refracted light rays is known as virtual image
  • virtual images are formed due to divergent reflected/refracted rays
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16
Q

real object gives -
virtual object gives-

A
  • virtual image
  • real image
17
Q
  1. RECTILINEAR PROPOGRATION OF LIGHT
A

Light always travels in straight lines from one point to another and this property of light is known as rectilinear propagation of light.