Mirror and Lenses

Question 1

Mirror

Answer 1

Substance from which only light rays reflect without significant absorption or refraction

Question 2

Three types of mirrors

Answer 2

Plane mirror, convex and concave

Question 3

Plane mirror

Answer 3

Flat reflective surface (what we have in our house)

Question 4

Curved mirrors

Answer 4

concave (convergence) and convex (divergence)

Question 5

Real images

Answer 5

concave

-convex and plane are virtual

Question 6

Optics problems

Answer 6

I- image formed by object

O- distance of object relative to mirror

Question 7

Thin lens and mirrors equation

Answer 7

1/0 + 1/i = 1/f

Question 8

Sign (pos and neg) in thin lens equation

Answer 8

positive
i=real, in front of mirror
f=Concave
o= in front

negative
i=vitrual, behind
f= Convex
o=behind

Question 9

Magnification equation

Answer 9

m=-i/o

Question 10

signs of magnification

Answer 10

upright= positive (virtual)
inverted= negative

Question 11

Convex

Answer 11

negative image distance

m=positive (image upright)

Question 12

Lenses

Answer 12

lights can pass through, bend and refract

Question 13

in lenses, convex and concave mean…

Answer 13

convex=converge

concave=diverge

Question 14

Lens maker equation

Answer 14

1/f=(n-1)(1/r1-1/r2)

Question 15

Lens anatomy

Answer 15

i=positive is real and virtual

f=positive is convex and negative is concave

Question 16

Diopters

Answer 16

positive=converging
negative=diverging
p=1/f

Question 17

Diopters

Answer 17

units=inverse meters (focal length must be in meters)
f=r/2
-f is directly proportional to r

Question 18

The eye

Answer 18

cornea acts as a lens

• Mopia- too strong and nearsightdness
• Hyperopia- farsighted