Unit C

Question 1

What did Euclid discover?

Answer 1

Light reflects in the same angle

Question 2

Who shine a light through a prism?

Answer 2

Newton

Question 3

Who found the accurate speed of light?

Answer 3

Albert A Michelson

Question 4

What is a light year?

Answer 4

It measures how far light can travel through space per year 9 460 500 000 km

Question 5

Two Lenses through a tube = _______ telescope

Answer 5

Refracting

Question 6

shadows?

Answer 6

When light hits an object and can’t go any further

Question 7

true or false: during a full lunar eclipse, the moon casts a shadow over the Earth

Answer 7

False

Question 8

which mirror diverges light?

Answer 8

Convex

Question 9

What causes refraction?

Answer 9

Changes in the speed of light

Question 10

Thicker edges, thinner center?

Answer 10

Concave lens

Question 11

Thicker centre, thinner edges?

Answer 11

Convex lens

Question 12

What is the amplitude of a wave?

Answer 12

Height of wave from rest position to the crest

Question 13

More waves/second = higher frequency= _____ crests

Answer 13

Closer

Question 14

When did a tsunami hit Japan and how high was it?

Answer 14

1771, 85 m

Question 15

What is used for mri?

Answer 15

Radio waves

Question 16

Radar?

Answer 16

Microwaves

Question 17

What was first used as filament and what is used now?

Answer 17

Bamboo, tungsten

Question 18

Incandescent light

Answer 18

95% heat 5% light

Question 19

Primary colours?

Answer 19

Red green blue

Question 20

Secondary colours

Answer 20

Magenta, yellow and cian

Question 21

Most common colour blindness?

Answer 21

Red-green colour blindness

Question 22

Aperture on a camera is similar to the _____ on a human

Answer 22

Pupil

Question 23

Rods are sensitive to light, as cones are sensitive to ______

Answer 23

colours

Question 24

When the image falls behind the retina?

Answer 24

Farsighted

Question 25

When image falls in front of the retina?

Answer 25

Nearsighted

Question 26

How many cones do birds have?

Answer 26

5

Question 27

Large pixels= ______ quality

Answer 27

Poor

Question 28

Who thought that light consisted of beams?

Answer 28

Pythagoras