physics refraction

Question 1

Lights tracked at a speed of

Answer 1

3.00 x 10^8 m/s
In vacuum

Question 2

REFRACTION?

Answer 2

light doesn’t require a medium to travel;however, lights path changes through different mediums

The speed is dependent on the medium

Question 3

RULES FOR REFRACTION

Answer 3

1. Incident ray, refracted ray, and normal lie on same plane
2. Incident ray and reflected ray are on opposites sides that separate the two mediums
3. When…
   speed of light in 1st medium is faster than second medium - light bends toward normal

speed of light in 1st is slower than second medium - light bends away from normal

Question 4

INDEX OF REFRACTION

Answer 4

to find out how light behaves in a medium - we have to compare it to speed of light in vacuum

n = c/v

Question 5

n = c/v

N?

Answer 5

n has no units and is the index of refraction of medium (CHART)

Question 6

n = c/v.

C?

Answer 6

The speed of light in a vacuum
(3.00x10^8 m/s)

Question 7

n = c/v.

V?

Answer 7

Speed of light in a medium

Question 8

Index of refraction (n) is a ration of

Answer 8

The speed of light in a vacuum and light in a medium (larger number, greater the decrease in speed)

Question 9

INTERNAL REFLECTION

Answer 9

light bends away from normal if 2nd medium is faster than 1st.
If angle of incidence increases the angle would increase until reaching CRITICAL ANGLE

Question 10

what is the CRITICAL ANGLE

Answer 10

angle of incidence that results in an angle of refraction of 90°.

Past this point, light rays will no longer appear in the medium

Question 11

RULES FOR TOTAL INTERNAL REFLECTION

Answer 11

1. Light in 1st medium travels slower then second medium
2. Angle of incidence is large enough that no refraction occurs in second medium. The ray is reflected back into first medium.

Question 12

INTERNAL REFLECTION is used in

Answer 12

Fibre optics (neon lights)
Prisms
Retoreflectors
Depth - refraction
Mirage - refraction
Rainbows - refraction