Science

Question 1

What are the two conditions that must be met in order for total internal reflection?

Answer 1

Must be travelling from slow to fast and the angle of incident must be bigger than the critical angle or angle of reflection

Question 2

Object distances are always

Answer 2

Positive

Question 3

Which distances are always blank for real images and blank for virtual

Answer 3

Positive negative

Question 4

Focal length is always

Answer 4

Positive for converging lenses negative for diverging lenses

Question 5

Object, height and image height is always

Answer 5

Positive when measured upwards from the principal axis and negative one measured downwards

Question 6

Magnification is

Answer 6

Positive for an upright image and negative inverted image