Learning Intention 2

Question 1

Electromagnetic spectrum

Answer 1

• radio waves
• microwaves
• infrared
• visible light
• ultraviolet
• x-rays
• gamma rays

Question 2

Characteristics of radio waves

Answer 2

long wavelength, low frequency and used in communication technologies like radios and televisions

Question 3

Characterisitics of microwaves

Answer 3

shorter than radiowaves, used in microwave ovens, satellites, mobile phone communications, GPS, Bluetooth, and Wi-Fi

Question 4

Characteristics of infrared light

Answer 4

lower frequency and lower energy than visible light, and is used in remote controls, thermal imaging cameras, transmitting info between computers or mobile phones and keeps the Earth at a comfortable temperature due to greenhouse gas

Question 5

What is visible light

Answer 5

the only part of the spectrum visible to the human eye. Colours are produced by light waves of different frequencies and wavelengths, and white light is a combination of the whole EMR spectrum. Red has the longest wavelength and the lowest frequency.

Question 6

What is visible light used in

Answer 6

everything from vision and photgraphy

Question 7

Characteristics of ultraviolet

Answer 7

short wavelengths, high frequencies and high energy. used for sterilisation, tanning beds and is important for the production of Vitamin D. It also causes sunburns

Question 8

Characteristics of X-rays

Answer 8

high energy, used in medical imaging to view inside the body

Question 9

Characteristcs of gamma rays

Answer 9

shortest wavelength and the highest frequency used in cancer treatment emmitted by nuclear reactions