Optics Terms

Question 0

Non luminous

Answer 0

Does not produce it’s own light but reflects light to be seen (moon)

Question 1

Luminous

Answer 1

Products of its own light

Question 2

Transparent

Answer 2

Fully allows light to pass through. (Clear glass)

Question 3

Translucent

Answer 3

Partially allows light to pass through (bathroom widow glass)

Question 4

Opaque

Answer 4

Does not allow light to pass through. (Metal) (timber)

Question 5

Scattering of light

What kind of light can reflect?

Answer 5

Smooth

Question 6

Absorption/ reflection

Why is the wall yellow?

Answer 6

When the white light heats the wall, the yellow wave- length is reflected, all other wavelengths are absorbed.

Question 7

Short sighted

Answer 7

Can’t see FAR objects

Need to have a CONCAVE lens to correct sight

Question 8

Long sighted

Answer 8

Can’t see NEAR objects

Need to have a CONVEX lens to correct sight.

Question 9

To have clear sight the image must

Answer 9

Be focused on the retina

Question 10

A thick lens has a

Answer 10

Shorter focal length

Question 11

A thin lens has

Answer 11

Longer focal length