Optics #2

Question 1

What is a convex mirror and what is another name for it?

Answer 1

Curves outward

Diverging mirror

Question 2

What is the salt characteristics for a convex mirror?

Answer 2

S- smaller
A- upright
L-inside f
T- virtual

Question 3

What are some applications for a diverging mirror?

Answer 3

Security mirror

Passenger vehicle mirror

Question 4

What is refraction

Answer 4

When light passes from one medium to another, the light rays bend because the speed of light travels at different speed in different mediums

Question 5

What is MLA

Answer 5

More dense to Less dense Away from the normal

Question 6

What is LMT

Answer 6

Less dense to More dense Towards the normal

Question 7

What is apparent depth?

Answer 7

Light reflects off object and bends away from the moral and it exits from water to air
Our eyes can’t account for this so they extend the refracted rays back until they cross creating a virtual image

Question 8

What is the index of refraction?

Answer 8

The ratio of speed of light in a vacuum to the speed of light in another medium
It’s unit less

Question 9

What is total internal refraction?

Answer 9

When the incident angle passes the critical angle resulting in the refracted eat not exiting the medium but instead reflects back into the medium causing the light to be trapped inside

Question 10

What two conditions must be present for TIR to occur?

Answer 10

Light must travel from a more dense to less dense medium

Angle of incidence > critical angle

Question 11

What are some applications of TIR?

Answer 11

Diamonds
Fiber optics
Prisms

Question 12

What are lenses?

Answer 12

Transparent objects that are used to refract light to help form a image

Question 13

What is a converging lens and what is another name for it?

Answer 13

Thicker in the center then the edges causes parallel light rays to converge to a single point.
Convex lens

Question 14

What is a diverging lens and what is another name for it?

Answer 14

Thicker in the edges than at the center causes parallel light rays to diverge
Concave lens

Question 15

What is the Salt characteristics for a diverging lens?

Answer 15

S- smaller
A- upright
L- inside f
T- virtual

Question 16

What are some application for a converging lens?

Answer 16

Magnifying glass

Cameras

Question 17

What is farsighted and what lens can you use to correct it?

Answer 17

Hyperopia. Can see far objects but not close objects, light rays are being focused beyond the retina. To correct use a converging lens

Question 18

What is near sighted?

Answer 18

Myopia. Can’t see far but can see up close because space between retina and lens is to large. Light is converging before the retina. To correct use a diverging lens

Question 19

Name four parts of the human eye and how they function

Answer 19

Iris- coloured part of the eye and helps regulate amount of light entering
the eye
Pupil- dark center missing in iris, works with iris to help change the amount of light entering the eye
Optic nerve- takes electrical impulses to the brain
Lens- focuses light Ray onto the retina.