General Flashcards
1
Q
What is meant by ionised gas?
A
1) Some atoms have lost electrons, 2) to become +ve ions
2
Q
What is sensitivity?
A
Ratio of output to input
Change in output / Change in input
3
Q
What is the order of the EM spectrum? Lowest energy to Highest energy
A
Radio waves Microwaves Infrared radiation Visible light Ultraviolet X-rays Gamma Rays
4
Q
For EM waves: radio waves have the highest….. and the lowest…..
A
Highest wavelength
Lowest energy, Lowest frequency
5
Q
What is the rough wavelength of radio waves?
A
10³
6
Q
What is the rough wavelength of microwaves?
A
10⁻²
7
Q
What is the rough wavelength of Infrared radiation?
A
10⁻⁵
8
Q
What is the rough wavelength of Visible light?
A
400 - 700 nm
9
Q
What is the rough wavelength of Ultraviolet?
A
10⁻⁸
10
Q
What is the rough wavelength of X-rays?
A
10⁻¹⁰
11
Q
What is the rough wavelength of Gamma Rays?
A
10⁻¹²
