A
B
C
D
A
B
C
D
A
B
C
D
Anode and top Y plate
Anode and bottom Y plate
Cathode and top Y plate
Cathode and bottom Y plate
A
B
C
D
Towards the negative plate
Towards the positive plate
Into the page
Out of the page
A
B
Alpha particles
Electrons
Neutrons
Protons
Between A and B
Between A and D
Between B and D
Between C and D
Air
Alpha particles
Hydrogen
Vacuum
Wait!
Here's an interesting quiz for you.