Stuff I know (but I may forget)

Question 1

Concave

Answer 1

As focal length increases, the power decreases, the radius increases, and the curvature decreases.

Question 2

Convex

Answer 2

As focal length decreases, the power increases, radius decreases, and the curvature increases.

Question 3

For someone with myopia (nearsightedness), what lens would you use?

Answer 3

Concave lenses curve inward and bend the light rays outward which causes the light rays to diverge. The light is focused in front of the retina, and doesn’t reach it, so concave lenses allow the light to bend and focus further back.

Question 4

For someone with hyperopia (farsightedness), what lens would you use?

Answer 4

Convex lenses round outwards, and cause light rays to converge. The light is focused behind the retina, and it must focus closer to the retina, so convex lenses are used for this with far-sightedness.

Question 5

Newton’s First Law

Answer 5

An object in motion will stay in motion unless acted upon by an outside force

Question 6

Newton’s Second Law

Answer 6

An object’s acceleration is directly proportional to the net force applied and inversely proportional to its mass.

Question 7

Newton’s Third Law

Answer 7

For every action, there is an equal and opposite reaction.