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Physical Science 105 Sem 1 > Chapter 7light > Flashcards

Chapter 7light Flashcards

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1
Q

visible light

A

incandescant

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2
Q

reflection

A

parellel rays

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3
Q

diffuse reflection

A

light reflected in random directions off objects

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4
Q

light interacts with matter whar three ways

A

reflection, diffuse reflection, absorbtion

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5
Q

opaque

A

reflects light

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6
Q

transparent

A

transmitting light

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7
Q

incoming light is called

A

incident ray

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8
Q

the incident ray and reflected rays angles are related how?

A

same angle

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9
Q

perpendicular to point of reflection

A

the normal

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10
Q

flat mirrors produce what image

A

virtual

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11
Q

light rays originate from

A

a real image

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12
Q

in transparent medium light ray do what

A

refract

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13
Q

refraction depends on

A

incident angle and index of refraction

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14
Q

index of refraction

A

ratio of the speed of light in a vacuum to the speed of light in the medium

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15
Q

total internal reflection

A

refracted angle equals 90o

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16
Q

critical angle

A

limit to the angle of incidence

17
Q

when are light rays reflected internally?

A

when the critical angle is 90+

18
Q

spectrum

A

red to violet

19
Q

what special property does a glass prism have?

A

dispersion

20
Q

why does dispersion occur?

A

the index of refraction is different for each range of colors

21
Q

interference

A

light passes through small slits or holes and produces and interference pattern of bright lines and dark zones

22
Q

interference pattern

A

bright lines and dark zones

23
Q

polarized light

A

virbrates in one direction only in a plane

24
Q

what three ways can light be polarized?

A

by certain materials, by reflection or by scattering

25
Q

polarizetion explained by what model

A

transverse wave model

Physical Science 105 Sem 1 (10 decks)

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