Mirrors

Question 1

What are all angles measured From?

Answer 1

The normal

Question 2

What is a specular reflection?

Answer 2

Rays that reflect in a clear pattern off a microscopically smooth mirror that shows images

Question 3

What is a diffuse reflection?

Answer 3

Rays are scattered after hitting a microscopically rough mirror line. No image is formed

Question 4

What are the four image characteristics?

Answer 4

Location- behind or in front
Orientation- inverted or erect
Size- larger or smaller
Type- real or virtual

Question 5

What’s the difference between qualitative and quantitative?

Answer 5

Qualitative is describing something (like in front or behind)
Quantitative is using numbers (how far in front or behind)

Question 6

Describe a plane mirrors image characteristics

Answer 6

Location- behind mirror same distance
Orientation- erect
Size- exact same
Type- virtual

Question 7

What are the differences between concave and convex mirrors?

Answer 7

Concave is a piece bent in towards the focal point. F is positive and rays converge to f

Convex is a piece bent away from focal point. F is negative and rays diverge from F

Question 8

Describe the image of a convex mirror

Answer 8

The image is behind the mirror between mirror and f , erect, smaller, and virtual

Question 9

Describe the image of concave mirror inside f

Answer 9

Behind the mirror, erect, larger, virtual

Question 10

Describe the image of a concave mirror on f

Answer 10

No image

Question 11

Describe the image On a concave mirror between f and c

Answer 11

In front of the mirror beyond c, inverted, larger, real

Question 12

Describe the image on a concave mirror on c

Answer 12

The image is in front of mirror on c, inverted, same size, real

Question 13

Describe the image on a concave mirror beyond c

Answer 13

The image is between f and c in front of mirror, inverted, smaller, real

Question 14

Describe the image of an object in a concave mirror located extremely far beyond c

Answer 14

The image is in front of mirror on f, inverted, very small, real

Question 15

What is the line that goes through The mirror perpendicular and the focal point and point of curvature

Answer 15

Principal axis

Question 16

What does C mean

Answer 16

Centre of curvature or radius

Question 17

What does F mean?

Answer 17

Focal point

Halfway between C and mirror

Question 18

What does f mean?

Answer 18

The focal distance (distance from vertex to focal point)

Question 19

What are the three Ray rules for concave mirrors?

Answer 19

1. Rays parallel to the PA reflect through F
2. Rays through F reflect parallel to the PA
3. Rays through C reflect back through C

Question 20

What is the mirror equation?

Answer 20

1/f=1/di + 1/do

Question 21

What is the distance of a virtual image compared to a real image?

Answer 21

Virtual images distances are negative, real images distances are positive

Question 22

What does positive magnification mean?

Answer 22

Image is erect and larger

Question 23

What does a negative magnification mean?

Answer 23

Image is inverted

Question 24

What are the magnification equations?

Answer 24

M= -di/do 
M = hi/ho

Question 25

What are the three rays used for convex mirrors?

Answer 25

1. Ray reflects parallel to mirror, then reflect out as it came from F
2. Ray aims towards F and reflects parallel to PA
3. Ray aims towards C and reflects straight back through C

Question 26

What is spherical aberration? Why is it bad? What causes it? How to fix it?

Answer 26

Spherical aberration is when the light rays don’t all pass through The focal point, this causes the image to be blurry or distorted. Can be fixed using mirror shaped like a parabola