physics chapter 12 Flashcards
(10 cards)
1
Q
what are the characteristics of a plane mirror image
A
- the image is the same size as the object
- the image is laterally inverted
- the image is upright
- the image is the same distance from the mirror as the object
2
Q
what are the applications of mirrors
A
- vision testing
- periscopes
- instrument scale
- blind corner mirror
3
Q
define reflection
A
the rebounding of light at a surface
4
Q
define refraction
A
the bending of light as it passes from one optical medium to another
5
Q
how can we calculate the refractive index of a medium
A
n= speed of light in a vacuum/ speed of light in the medium
n= sin i/ sin r
6
Q
define normal
A
the imaginary line perpendicular to the refracting surface at the point of incidence
7
Q
what are the applications of total internal reflection
A
binoculars, periscopes, single lens reflex camera
8
Q
what is a converging lens
A
it is thicker at the centre
9
Q
what is a diverging lens
A
it is thinner at the centre
10
Q
define dispersion
A
the change in refractive index across the spectrum
