Review of Waves and RaysSNC2D

Similarities and Difference between Waves and Rays?

• Similarities: • They all have a wave pattern• They all transfer energy from one point to

another• Differences: • Waves have longer wavelengths than rays• Waves have smaller frequency levels than

rays

Question 1:

Which type of electromagnetic radiation has the longest wavelength?

Radio Waves

Question 2:

Which type of electromagnetic radiation has the shortest wavelength?

Gamma Rays

Question 3:

This type of electromagnetic radiation is used in radars to measure automobile speed

Microwaves

Question 4:

Alarms and motion sensors all use this form of electromagnetic radiation

Infrared Waves

Question 5:

T F A small amount of ultraviolent rays is healthy for humans

TRUE! We get Vitamin D from the Sun!

Question 6:

Which two types of electromagnetic radiation can penetrate through human tissue?

X-rays and Gamma rays

Question 7:

This type of electromagnetic radiation is used to kill cancer cells – unfortunately they also kill some healthy cells as well

Gamma rays

YOUR TASK – You have 10 minutes!You are an investigator trying to figure out a murder

case. Write a scenario where you use EACH type of electromagnetic radiation. Be as creative as you wish.