Waves

Question 1

What are electromagentic waves?

Answer 1

• Tranverse waves.
• ## Transfer energy from the source of the waves to an absorber.

Question 2

Electromagnetic Spectrum:

Answer 2

• Each color of light:
• Different wavelenghts + Frequencies.
• Red= Lower Frequency + Longer wavelength.
• Violent= Higher Frequency + Shorter wavelength.

NOTE:
- Visible light is the only part of the electromagentic spectrum that can be dected by the human eye.
-

Question 3

Order of the EM spectrum:

Answer 3

• Radio Waves, Microwaves, Infrared Radiation, Visible light, ulta-violet light, X rays, Gamma rays.
• Continous spectrum as the cut off between one type of wave and another is not always clear.
• DO NOT need a medium to travel through in so can travel through a vaccum.
• All electromagnetic waves travel the same speed in a vaccum.

Question 4

What is the speed of em waves?

Answer 4

• 3 x 10^8 m/s.

Question 5

Extra details:

Answer 5

• Different materials absorb, transmit or reflect electromagnetic waves.
• ## What happens to the waves depend on wavelength.