Optics

Question 0

Incandescence

Answer 0

The production of light as a result of a high temperature

Ex) incandescent light bulb

Question 1

The order of the electromagnetic spectrum

Answer 1

1. Radio waves
2. Microwaves
3. Infrared light
4. Visible light
5. UV light
6. X-rays
7. Gamma rays

Question 2

Electric discharge

Answer 2

The process of producing light by passing an electric current through a gas
Ex) neon sign

Question 3

Phosphorescence

Answer 3

The process of producing light by the absorption of UV light resulting in the emission of visible light over an extended period of time
Ex) glow-in-the-dark toys

Question 4

Fluorescence

Answer 4

The immediate emission of visible light as a result of the absorption of UV light
Ex) fluorescent light

Question 5

Chemiluminescence

Answer 5

The direct production of light as the result of a chemical reaction with little or no heat produced
Ex) glow sticks

Question 6

Bioluminescence

Answer 6

The production of light in living organisms as the result of a chemical reaction with little or no heat produced
Ex) fireflies

Question 7

Triboluminescence

Answer 7

The production if light from friction as a result of scratching, crushing, or rubbing certain crystals
Ex) rubbing two quartz crystals together

Question 8

LED

Answer 8

Light produced as a result of an electric current flowing in semi-conductors
Ex) christmas lights

Question 9

Describe the image produced by a plane mirror using S. A. L. T.

Answer 9

S. same
A. Upright
L. Behind the mirror
T. Virtual

Question 10

Describe the image always produced by a convex (diverging) mirror

Answer 10

S. smaller
A. Upright
L. (Varys)
T. Virtual

Question 11

Describe the image always produced by a diverging lens

Answer 11

S. smaller
A. Upright
L. On the same side of the lens as the object
T. Virtual

Question 12

What is refraction?

Answer 12

The bending or change in direction of light when it travels from one medium into another

Question 13

What are the rules of refraction?

Answer 13

1. The incident ray, refracted ray, an the normal all lie on the same plane. The incident ray and the refracted ray are on opposite sides of the line that separates the two mediums
2. Light bends toward the normal when the speed of light in the second medium is less than the speed of light in the first medium. Light bends away from the normal when the speed of light in the second medium is greater

Question 14

What is total internal reflection?

Answer 14

Occurs if the angle if incidence is greater than the critical angle ( the angle of incidence that results in an angle of refraction of 90*)

Question 15

Virtual image vs real image

Answer 15

A virtual image is an image on which light does not actually arrive at or come from the image location

Question 16

Apparent depth

Answer 16

The depth that an object appears to be at, due to the refraction of light in a transparent medium

Question 17

The flattened sun

Answer 17

The sun appears flattened near the horizon because light from the bottom if the sun is refracted more through earth’s atmosphere than light from the top of the sun

Question 18

Shimmering

Answer 18

Caused by light traveling at slightly different speeds through air layers of different temperatures

Question 19

Mirage

Answer 19

The result of refraction and total internal reflection in layers of air in different temperatures

Question 20

Rainbow

Answer 20

Caused by refraction of sunlight and partial internal reflection in water droplets in earths atmosphere

Question 21

What do c, v, and n stand for?

Answer 21

N is the index of refraction, c is the speed of light on a vacuum, v is the speed of light in medium