Optics

Question 1

What is the name of an individual path of travel for light?

Answer 1

A ray.

Question 2

What does SALT stand for?

Answer 2

Size (smaller, larger, equal)
Attitude (Upright/Inverted [upside down])
Location (distance from mirror)
Type (Virtual [behind mirror]/Real [in front of mirror])
***ALL OF THESE APPLY TO THE IMAGE, NOT THE OBJECT

Question 3

What is the formula for light reflecting off of a surface?

Answer 3

Θi=Θr, meaning the angle of incidence is equal to the angle of reflection.

Question 4

What does incandescence mean?

Answer 4

It is a type of luminescence in which electrical energy is put through a conductor called a filament. The electrical energy is then released in the form of radiant energy (heat and light)

Question 5

What is fluorescence?

Answer 5

It is a type of luminescence in which electrical energy passes through fluorine gas, and is turned into radiant energy.

Question 6

What is chemiluminescence?

Answer 6

It is a type of luminescence in which a chemical reaction causes the release of energy in the form of radiant energy.

Question 7

What is bioluminescence?

Answer 7

Chemiluminescence that takes place naturally within an organism.

Question 8

What is triboluminescence?

Answer 8

When strong chemical bonds (usually crystals) are broken quickly and release radiant energy for a fleeting moment. (wintogreen lifesavers)

Question 9

What is nuclear FISSION, and how does it produce light?

Answer 9

Nuclear fission is when an unstable nucleus breaks apart. The released energy is then output as light.

Question 10

What is nuclear FUSION, and how does it produce light?

Answer 10

Nuclear fusion is when two molecules fuse together to create another element. It normally occurs in stars because of the pressure created by their massive gravity fields, and produces light that hits planets and other objects.

Question 11

What is the difference between a luminescent object and a non-luminescent object?

Answer 11

Luminescent objects create their own light, whereas non-luminescent objects reflect light from luminescent objects.

Question 12

What are some low frequency waves?

Answer 12

Radiowaves, microwaves, infared

Question 13

What are some high frequency waves?

Answer 13

Ultraviolet, X-rays, Gamma rays

Question 14

In a wave, what is the highest point?

Answer 14

The crest.

Question 15

In a wave, what is the lowest point?

Answer 15

The trough.

Question 16

In a wave, what is the distance between the crest and the average of the waves called?

Answer 16

The amplitude.

Question 17

In a wave, what is the distance from crest-crest/trough-trough called?

Answer 17

The wavelength.

Question 18

The more energy, the ____ the wavelength.

Answer 18

The more energy, the shorter the wavelength.

Question 19

What material only transmits light?

Answer 19

Transparent materials (glass, air, pure water)

Question 20

What material transmits some light and reflects or absorbs the rest?

Answer 20

Translucent materials (frosted glass, waxed paper)

Question 21

What material does not allow light to pass through it, and reflects/absorbs the rest?

Answer 21

Opaque materials.

Question 22

What is the difference between regular and diffused reflection?

Answer 22

Regular reflection reflects an image perfectly, such as a mirror or shiny object. Diffused reflection is the regular reflection that we see normal, rough objects perform, and this is what causes us to see objects as having certain colours.

Question 23

What is the type of wave that light is associated with?

Answer 23

Electromagnetic radiation.

Question 24

What is the transfer of energy through space or matter?

Answer 24

Radiation.