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Physics > Reflection\Refraction > Flashcards

Reflection\Refraction Flashcards

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1
Q

Self-luminous object

A

Emits own light

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2
Q

Non-luminous object

A

Does not emit own light

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3
Q

Diffuse reflection

A

Reflected light scattered in all directions from object

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4
Q

Regular reflection

A

one incident ray bounces off a plane mirror to produce one reflected ray

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5
Q

2nd law of reflection

A

The incident ray, the normal and the reflected ray all lie on the same plane

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6
Q

2nd law of reflection

A

Angle of incidence is always equal to the angle of incidence( i=r )

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7
Q

Real image

A

Image formed by the actual intersection of rays

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8
Q

Virtual image

A

Image formed by apparent intersection of rays (Plane mirror always virtual)

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9
Q

Lateral inversion

A

As result of virtual image image is flipped

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10
Q

Use of plane mirror

A

Periscope = 2 plane mirrors, allows you to see over an object

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11
Q

Method of no parallax

A

apparent relative motion of the pencils due to the motion of the observer

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12
Q

Refraction

A

The bending of a ray of light when it goes from one medium to another

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13
Q

Less dense = more dense

A

light refracted towards the normal

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14
Q

More dense= less dense

A

light refracted away from normal

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15
Q

Law 1 of refraction

A

incident ray, normal, refracted ray all on the same plane

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16
Q

Law 2 of refraction

A

Sin i over Sin r = refractive index (snell’s law)

17
Q

critical angle

A

point at which refracted ray becomes reflected ray

corresponding angle is 90 degrees to the normal

18
Q

total internal reflection

A

i > C

reflected back rather than refracted

19
Q

Snell’s window

A

only light which strikes the water within a radius r will reach your eye

20
Q

Optical fibres

A

Very thin transparent rod through which light can travel by total internal reflection

Physics (16 decks)

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