Refraction (lesson 7)

Question 1

refraction of light depends

Answer 1

on light traveling on an angle.

Question 2

The Laws of Refraction

Answer 2

light propagates linearly (they travel in a straight line)
Electromagnetic waves (travel at the speed of light)

Question 3

refraction

Answer 3

the bending of light as it travels in an angle, from a material with one refractive index (density) to a material with a different refractive index (density).

Question 4

Light travels in a straight line and at a constant speed as long as it is travelling in
the

Answer 4

same medium

Question 5

Refracted Ray

Answer 5

Light ray that is bent upon entering a second medium

Question 6

Angle of Refraction

Answer 6

Angle between the normal and the refracted ray

Question 7

Refractive Index

Answer 7

The amount a transparent material slows down the speed of light

Question 8

The refracted ray bends away from the normal when the light travels from a

Answer 8

slower medium (more optically dense)
into a faster medium (less optically dense)

Question 9

The amount a transparent material

Answer 9

slows down the speed of light

Question 10

Light travels fastest in a

Answer 10

vacuum (air)

Question 11

FIBRE OPTICS

Answer 11

Fibre optic technology uses light
to transmit information using a glass or plastic cable. Once inside, the
light cannot escape due to total internal reflection and is continually
reflected back inside the cable (as shown in the diagram above). This
occurs because of how the cables are made.

Question 12

PAVEMENT MIRAGE

Answer 12

Mirages are optical illusions caused by
the differences in air temperature
(thus changing the index of refraction
of the air). Cold air is more dense
than warm air, so cold air has a higher
index of refraction.

Question 13

APPARENT SUNSETS (flattened Sun)

Answer 13

the light rays from the bottom of the Sun
have a greater angle of incidence than the light rays from the top of
the Sun. This results in the Sun having a flattened appearance.

Question 14

REFLECTOR

Answer 14

The reflectors are shaped and angled such that when any parallel
incident rays enter it, they will always bounce off at 90 twice to
reflect the light back out where it came from.

Question 15

DIAMONDS

Answer 15

When light rays enter a diamond, they experience several total internal
reflections (due to the cut) before travelling back into the air (causing
more refraction). Together, these cause the sparkle of diamonds.

Question 16

SHIMMERING

Answer 16

As
with a mirage, shimmering is caused by light being refracted as it
passes through air of different temperatures.

Question 17

BINOCULARS

Answer 17

At the glass/air boundary of the flat surface, Prisms in binoculars use total internal reflection, rather than reflective coatings.