Light and Vision

Question 1

What is Myopia?

Answer 1

Short-sightedness
Images are focused in from of retina, distant objects are blurry CONCAVE

Question 1

What is Hyperopia?

Answer 1

Long-sightedness
Images are focused behind retina causing blurring up close CONVEX

Question 1

What are some causes of Blindness?

Answer 1

Corneal Opacity
Cataracts
Retinal Development
Visual Tract

Question 1

What do Luminous Objects do?

Answer 1

Produce Light

Question 2

What do Reflective Objects do?

Answer 2

Do not produce light, but reflect it form Luminous objects

Question 3

What is Refraction?

Answer 3

The bending of light as it changes from one medium to the other. The light beam accelerates and bends away from normal when it enters a less dense medium

Question 4

What is the difference between Polarised and Unpolarised?

Answer 4

Polarised - Electric + Magnetic fields oscillate in one direction
Unpolarised - Electromagnetic fields oscillate in all possible directions

Question 5

What is Accomodation?

Answer 5

The ability of the eye to change the focal length of the lens by changing the curvature of the eye lens

Question 6

What is Frequency?

Answer 6

Number of complete waves that pass a particular point in one second

Question 7

What is Velocity?

Answer 7

How fast the wave is moving forwards

Question 8

What is wave length?

Answer 8

Distance between two crests and dips on successive waves