Topic 5

Question 1

Wave

Answer 1

A disturbance that transfers energy from place to place.

Question 2

Mechanical Wave

Answer 2

A wave that travels through a medium.

Question 3

Medium

Answer 3

The matter waves travel through.

Question 4

Vacuum

Answer 4

Space with no matter

Question 5

Electromagnetic Radiation

Answer 5

A type of energy.

Question 6

Electromagnetic Wave

Answer 6

Waves that transfer electromagnetic radiation, and can travel without a medium.

Question 7

Transverse Wave

Answer 7

Mechanical wave where vibrations travel perpendicular to the direction of the source’s motion.

Question 8

Amplitude

Answer 8

Distance between the highest crest and the resting point of the wave.

Question 9

Longitudinal Wave

Answer 9

Mechanical wave where vibrations travel in the same direction as the source’s motion.

Question 10

Wavelength

Answer 10

A wave’s distance it travels before it repeats.

Question 11

Frequency

Answer 11

Number of times a wave repeats in a given amount of time.

Question 12

Rarefraction

Answer 12

A gap between compressions in a wave.

Question 13

Surface Wave

Answer 13

Combination of transverse and longitudinal waves.

Question 14

Reflection

Answer 14

When a wave bounces off an obstruction, and heads in a different direction.

Question 15

Refraction

Answer 15

Bending of waves due to a change in speed.

Question 16

Diffraction

Answer 16

The bending or spreading of waves as they move around a barrier or pass through an opening.

Question 17

Absorption

Answer 17

The energy of the wave transfers to the material it encountered.

Question 18

Standing Wave

Answer 18

A wave appearing to stand in one place.

Question 19

Resonance

Answer 19

Increase in amplitude of a vibration that occurs when external vibrations match an object’s natural frequency.

Question 20

Law of Reflection

Answer 20

States the angle of incidence equals the angle of reflection.

Question 21

Constructive Interference

Answer 21

2 similar sized waves collide to form a wave with a larger amplitude.

Question 22

Destructive Interference

Answer 22

2 similar sized waves collide to form a wave with a smaller amplitude.

Question 23

Nodes

Answer 23

Points with zero amplitude.

Question 24

Antinodes

Answer 24

Points with maximum amplitude of a standing wave.

Question 25

Loudness

Answer 25

The perception of the energy of a sound.

Question 26

Intensity

Answer 26

Amount of energy a sound wave carries per second through a unit area.

Question 27

Decibel

Answer 27

Unit for measuring loudness.

Question 28

Pitch

Answer 28

How high or low the speed is.

Question 29

Doppler Effect

Answer 29

The change in frequency of a wave as its source moves n relation to an observer.

Question 30

Electromagnetic Wave

Answer 30

Vibrating electric and magnetic fields that can move through space at the speed of light.

Question 31

Electromagnetic Spectrum

Answer 31

The complete range of electromagnetic waves placed in order of increasing frequency.

Question 32

Transparent

Answer 32

Material that transmits most light.

Question 33

Translucent

Answer 33

Material that scatters the light that passes through it.

Question 34

Opaque

Answer 34

Material that reflects or absorbs all light.

Question 35

Diffuse Reflection

Answer 35

Parallel light rays hit an uneven surface.

Question 36

Convex Mirror

Answer 36

Mirror that curves outwards.

Question 37

Concave Mirror

Answer 37

Mirror that curves inwards.

Question 38

Focal Point

Answer 38

Location which rays parallel to the optical axis reflect and meet.

Question 39

Regular Reflection

Answer 39

Parallel light rays hit a smooth surface.

Question 40

Optical Axis

Answer 40

An imaginary line dividing a mirror in half.

Question 41

Plane Mirror

Answer 41

Flat mirror that shows a virtual image.

Question 42

Virtual Image

Answer 42

An image that forms where light seems to come from.

Question 43

Color Filter

Answer 43

Tinted piece of glass or plastic.