Physics Review Game Questions:

(with answers)

1) Draw the electromagnetic spectrum with all 7 types of waves, from largest wavelength (on the left) to smallest wavelength (on the right). Include an arrow showing which way is increasing energy of the waves.

2) For each of the 7 types of electromagnetic waves, give an example of the use of each one.

Radiowaves

radio

Microwaves

Cook food in microwave

Infrared

Remote control

Visible light

Coloured clothing

Ultraviolet light

Sterilization of water and food

x-rays

Medical imaging

Gamma rays

Cancer treatment

3) Match the following ways light is produced to the given information below:

A) Incandescence

1

1) Electric current is run through a high resistance filament creating light and heat

B) Electric Discharge

5

2) Chemical reactions create light

C) Phosphorescence

6

3) Crystals rubbing together creates light

D) Fluorescence

8

4) Use semi-conductors to create light, such as Christmas lights and traffic lights

E) Chemiluminescence

2

5) Voltage through a gas creates light

F) Bioluminescence

7

6) Absorbs UV light and emits visible light over time

G) Triboluminescence

3

7) Living things emit light

H) Light-emitting diodes (LEDs)

4

8) Immediate release of visible light after UV light is absorbed

4) Give an example of each of the 8 ways light is produced.

Method

Example

incandescence

molten glass that glows

electric discharge

Lightening, neon signs

phosphorescence

glow-in-the-dark stickers

fluorescence

fluorescent light in classroom

chemiluminescence

light stick

bioluminescence

firefly

triboluminescence

biting a wintergreen candy

LEDs

Traffic lights

5) Draw 1 light ray hitting a plane mirror and reflecting off the mirror. Make it as accurate as possible. Label it with at least 5 proper terms.

6) Draw a dot in front of a plane mirror. Use light rays to show the image that is created. Be accurate as possible. Use SALT to describe the image.

7) Use a roll of tape to draw a diagram with a concave mirror, a principal axis, F, and C. The curve of the tape will give you the curve of your mirror. The distance to the other side of the tape will allow you to find C, and then to figure out F. Next, draw a candle inside of F. Use light rays to find the image, and describe that image using SALT. Lastly, replicate this whole diagram larger to fill your white board.

8) Use a roll of tape to draw a diagram with a convex mirror, a principal axis, F, and C. The curve of the tape will give you the curve of your mirror. The distance to the other side of the tape will allow you to find C, and then to figure out F (remember both are BEHIND the mirror!). Next, draw anywhere in front of the mirror. Use light rays to find the image, and describe that image using SALT. Lastly, replicate this whole diagram larger to fill your white board.

9) If the index of refraction for a substance is 1.31, find the speed that light would travel through that substance (ice).

n = c/v

n is the index of refraction,

c is the speed of light in a vacuum,

v is the speed of light in the medium

Rearrange formula: v = c/n

c = 3.0 x 108 m/s

n = 1.31

Put n and c into the formula and solve!

v = 2.29 x 108 m/s in ice.

10) Light travels through a substance at a speed of 2.04 x 108 m/s. Use the table below to find which substance this is.

n = c/v

c = 3.0 x 108 m/s

v = 2.04 x 108 m/s

Put values into the formula for c and v, then solve for n!

n = 1.47

if n = 1.47, then the unknown substance is vegetable oil.

11) Medium

Index of Refraction (n)

Air/vacuum

1.00

Ice

1.31

Pure water

1.33

Ethyl alcohol

1.36

Quartz

1.46

Vegetable oil

1.47

Acrylic

1.49

Glass

1.52

Zircon

1.92

Diamond

2.42

12) Using diagram(s), show what happens with total internal reflection. Include 5 labels.

Air

Water

13) What are the 2 conditions that must be met for total internal reflection to occur?

1. Light is travelling more slowly in the first medium than in the second.

2. The angle of incidence is large enough that no refraction occurs in the second medium. Instead the ray is reflected back into the first.

14) Using 2 diagrams, show why the names converging and diverging are given to the two types of lenses.

Converging lens = parallel incident rays refract through the glass and converge on the principal

focus.

Diverging lens = parallel incident rays refract through the glass and diverge away from each other.

15) Create a diagram with a principal axis, a converging lens in the centre, and then mark F and F’ at equal distances on either side of the lens. Then draw a candle outside of F’. Find the image created using light rays. Use SALT to describe that image.