Science Flashcards
1
Q
What are the two conditions that must be met in order for total internal reflection?
A
Must be travelling from slow to fast and the angle of incident must be bigger than the critical angle or angle of reflection
2
Q
Object distances are always
A
Positive
3
Q
Which distances are always blank for real images and blank for virtual
A
Positive negative
4
Q
Focal length is always
A
Positive for converging lenses negative for diverging lenses
5
Q
Object, height and image height is always
A
Positive when measured upwards from the principal axis and negative one measured downwards
6
Q
Magnification is
A
Positive for an upright image and negative inverted image
