Refraction, Reflection, Light Basics

Question 1

How we perceive light depends on…

Answer 1

1. The nature of light
2. How our eyes work
3. How our brains process the signal our eyes send them

Question 2

Specular Reflection:

Answer 2

reflection off a smooth surface

Question 3

Diffuse Reflection

Answer 3

reflection off a rough surface

Question 4

Are mirror reflections real or virtual images?

Answer 4

virtual

Question 5

Do mirrors invert right to left, up to down, or front to back?

Answer 5

front to back

Question 6

What is “Brilliant Cut” diamond?

Answer 6

when a diamond is cut a certain way that light undergoes a total internal reflection and cannot get out

Question 7

what is the speed of light in a vacuum?

Answer 7

3 x 10^8 m/s

Question 8

Does Magnification have units?

Answer 8

no

Question 9

what is the speed of light in a medium? Define the variables

Answer 9

v = c/n
v= speed
c= speed of light in a vacuum (3 x 10^8 m/s)
n= index of refraction

Question 10

What is the focal point and how is it measured?

Answer 10

The focal point is the point in which the light rays converge on a side of the lens. it is measured through focal length (f)

Question 11

What is the lens formula? Define the variables

Answer 11

1/f=1/o +1/i
f=focal length
o=object distance
i=image distance

Question 12

What is magnification? The formula and variables?

Answer 12

Magnification is how many times bigger/smaller the image is to the object. The formula is m=i/o or m=hi/ho. i is image distance/height. o is object distnace/height.

Question 13

When the focal length is behind the lens, it is…

Answer 13

negative

Question 14

What is an object at infinity?

Answer 14

a object at infinity is when the object is placed at a distance far away from the lens all the rays coming towards the lens are parallel.

Question 15

Do converging lenses flip right to left, top to bottom, and front to back?

Answer 15

they flip right to left and top to bottom, not front to back

Question 16

the thin lens formula only works when you are in paraxial approximation, which is…

Answer 16

when you only consider rays of light close to the optical axis

Question 17

What is chromatic aberration, what causes it?

Answer 17

chromatic aberration is color distortion in an image, it is caused by the different n values for different colors of light.

Question 18

what is spherical aberration? What re the two types? How do you fix it?

Answer 18

spherical aberration is when the edges of the photo get distorted. the two types are barrel and pincushion. You fix it by narrowing your aperture.