Optics

Question 1

What is the speed of light

Answer 1

3x10 to the power of 8

Question 2

How does light travel

Answer 2

Straight line

Question 3

What is the law of reflection

Answer 3

Angle of incidence=angle of reflection

Question 4

What does light do when it passes through a prisim

Answer 4

White light splits into different wavelengths when passing through the prisim and then shows the visible prisim

Question 5

List the parts of the electromagnetic from the highest amplitude downwards

Answer 5

Radio waves, microwaves, infrared, visible, UV, X-ray, gamma

Question 6

Identify a concave and a convex lens

Answer 6

Concave- caves in
Convex- rugby hall shape

Question 7

What happens to a ray of light when it passes through a convex lens

Answer 7

It comes in the way of

Question 8

What happens when light enters a concave lens

Answer 8

The light goes out the way

Question 9

Cornea

Answer 9

Transparent protective layer at the front of the eye that refracts light

Question 10

Iris

Answer 10

Coloured muscle that adjust the size of the pupil to control the amount of light that enters

Question 11

Pupil

Answer 11

Hole in the eye that allows the light to enter

Question 12

Lens

Answer 12

Refracts light to focus it on the retina

Question 13

Retina

Answer 13

Converts light into electrical impulses and makes an image

Question 14

Optic nerve

Answer 14

Carries a message from the retina to the brain

Question 15

Long sight

Answer 15

Can see far objects

Question 16

Short sighted

Answer 16

Can see near objects

Question 17

How can the lens correct long sight and what lens is used

Answer 17

A convex lens is used to fix long sightedness. The convex lens focuses the light in the retina instead of past it

Question 18

What lens corrects shortsightedness and how

Answer 18

Short sightedness is when the focused light meets before the retina. A concave lens is used to correct this as it pushes the light outward so it focuses on the retina