What is the purpose of a wave?

1
What is the purpose of a wave?

• To carry energy through matter or space.
• Or, to transfer energy

2
What waves require a medium to travel or do they
all require a medium to travel?

• Mechanical waves require a medium and
  electromagnetic do not.

3
What are longitudinal waves?

• Waves that vibrate parallel to the direction of
  the wave.

4
What are electromagnetic waves?

• Waves of oscillating electric and magnetic fields

5
What is the height of a wave called?

• Amplitude

6
What are transverse waves?

• Move perpendicular to the direction of the wave

7
What is diffraction?

• Bending of a wave around an opening or corner.

8
Draw and label a wave and its five main parts.

• See the board

9
What is the difference between a mechanical wave
and an electromagnetic wave?

• Mechanical requires a medium
• Electromagnetic waves do not require a medium

10
What are sound waves? Be able to give at least
one example.

• Waves that move out in spherical fronts.
• Exp iPods, stereos, etc.

11
What types of waves are sound waves?

• Longitudinal

12
What makes sound soft or loud?

• Amplitude

13
What measures the amount of energy in a sound
wave?

• Decibels

14
What is pitch and what determines pitch?

• Pitch is the level of a particular sound and it
  is determined by frequency.

15
What determines loudness?

• Pressure, Volume, or Intensity

16
Light scattering on a rough surface is called
what?

• Diffuse reflection

17
What is the wavelength of red light?

• 700 nm

18
What is the wavelength of violet light?

• 400 nm

19
What is another name for a flat mirror?

• Plane

20
What is the name of a mirror that bends inward?

• Concave

21
What is the name of a mirror that bends outward?

• Convex

22
How does light travel?

• In transverse waves

23
What is the law of reflection?

• The angle of incidence of a light ray is equal to
  the angle of reflection of the same light ray.

24
List the waves included in the electromagnetic
spectrum from low frequency to high frequency.

• Radio waves, microwaves, infrared waves, visible
  light, UV , X-rays, and Gamma

25
Angle of Incidence
Normal
Angle of Reflection
Reflecting Surface
26
Describe three ways light is related to waves.

1. To transfer energy
2. Travel in waves
3. Color is reflected as light waves
4. Produce interference waves like water

27
Name the colors of the visible light spectrum
from longest wavelength to shortest wavelength.
What is the acronym used to help remember the
order of the visible light spectrum?

• Red, Orange, Yellow, Green, Blue, Indigo, Violet
• ROY G BIV

28
Sound is a series of atmospheric pressure waves
produced by what?

• Vibrations