Physics

Question 1

What is light?

Answer 1

A form of energy that travels at very high speeds

Question 2

What type of wave does does light travel through?

Answer 2

Electromagnetic waves

Question 3

What is the portion of light that the human eye can see?

Answer 3

Visible Light

Question 4

What is an example of radio waves?

Answer 4

Cell phones

Question 5

What is the acronyms for the 7 different colours?

Answer 5

ROYGBIV

Question 6

What is a luminous object?

Answer 6

An object that produces light

Question 7

What is Incandescence?

Answer 7

The production of light as a result of high temperature

Question 8

What is electric discharge?

Answer 8

The process of producing light by passing an electric current through a gas

Question 9

What is Phosphorenscence?

Answer 9

Phosphorenscence is the process of producing light by the aborption of ultraviolet light resulting in the emission of visible light over an extended period of time.

Question 10

What are phosphorenscent materials described as?

Answer 10

‘Glow in the dark’

Question 11

What is Fluorescence?

Answer 11

The immediate emission of visible light as a result of the absorption of ultraviolet light (highlighter pens)

Question 12

What is Chemiluminescence?

Answer 12

The direct production of light as a result of a chemical reaction with little to no heat produced (glow sticks)

Question 13

What is Bioluminescence?

Answer 13

The production of light in living organisms as a result of a chemical reaction with little to no heat made

Question 14

What is Triboluminescence?

Answer 14

The production of light from friction as a result of scratching, crushing, or rubbing crystals (wintergreen lifesavers)

Question 15

What are LEDs?

Answer 15

Light emitting diodes produce light as a result of electric current flowing in semi-conductors

Question 16

What does Laser stand for?

Answer 16

Light Amplification by Stimulated Emission of Radiation

Question 17

What is a light ray?

Answer 17

A line and arrow representing the direction and path that light is traveling

Question 18

What is geometric optics?

Answer 18

The use of light rays to determine how light behaves when it strikes an object

Question 19

Reflection is…

Answer 19

the bouncing back of light from a surface

Question 20

What is a normal?

Answer 20

A perpendicular (right angles) to the reflecting mirror surface

Question 21

What is the angle of incidence?

Answer 21

The angle between the incident ray and the normal

Question 22

What is the angle of reflection?

Answer 22

The angle between the reflected ray and the normal

Question 23

What are the two laws of reflection?

Answer 23

1. The angle of incidence equals the angle of reflection
2. The incident ray, reflected ray, and the normal all lie in the same plane

Question 24

Reflection off of a smooth, shiny, surface is…

Answer 24

Specular reflection

Question 25

Reflection off of an irregular surface is...

Answer 25

Diffuse reflection

Question 26

What is a virtual image?

Answer 26

Virtual image - the reflection of an object that appears to be located behind the mirror but is not actually there

Question 27

What is lateral inversion?

Answer 27

Lateral inversion - refers to the fact that the orientation of an image in a plane mirror is backwards (flipped horizontally) and in reverse order

Question 28

What is SALT?

Answer 28

S - Size (same, smaller, larger) A - Attitude (upright or inverted) L - Location (behind : plane) T - Type (real or virtual)

Question 29

What is concave and convex...

Answer 29

Concave - middle presses away Convex - middle bulges towards

Question 30

What is a concave mirror also called...

Answer 30

Concave mirror is also called a converging mirror because it focuses the parallel rays at F.

Question 31

What is the vertex?

Answer 31

Vertex - where the principal axis intersects the mirror

Question 32

What is the principle axis?

Answer 32

Principle Axis - the line that goes through the centre of curvature

Question 33

What is the centre of curvation?

Answer 33

Centre of curvature (C) - the centre of the sphere whose surface forms the mirror

Question 34

When is no image formed...

Answer 34

When the object is located at F

Question 35

What are the characteristics of an image in a convex mirror?

Answer 35

Convex Mirror Image Characteristics - smaller - upright - virtual image

Question 36

When is a makeup mirror work?

Answer 36

If the object is located inside F

Question 37

If a light ray is through the C, what would happen?

Answer 37

It would reflect back onto itself

Question 38

What will happen to a light ray through the focus?

Answer 38

It will reflect parallel to the principle axis