Cathode Rays and Anode Rays Flashcards

Flashcards about cathode rays and anode rays

Cathode Rays

When a high voltage is applied across the electrodes, some invisible rays moved from the negative electrode to the positive electrodes.

Path of Cathode Rays

Travels straight from the cathode at a very high velocity, and it produces shadow of the object placed in its path.

X-rays

Cathode rays produce these when they strike against hard metals like tungsten, copper etc.

Heating Effect

Cathode rays have this effect on thin metal foils.

Green Glow/Light Emission

Cathode rays produce this when they strike the glass wall beyond the anode or strike the zinc sulphide screen.

Penetration

Cathode rays can do this through thin sheets of aluminum and other metals.

Photographic Effect

Cathode rays have this effect on photographic plates.

Charge to Mass Ratio

The ratio of charge to mass is the same for all cathode rays irrespective of the gas.

Anode Rays Property 1

Travel in straight lines and cast shadow of objects placed in their path.

Anode Rays Property 2

Deflected by magnetic and electric fields, but direction is opposite to cathode rays.

Anode Rays Property 3

Positively charged.

e/m Value of Anode Rays

Dependent on the nature of the gas taken in the tube.

Anode Rays Property 4

Produce flashes of light on ZnS screen.

Anode Rays Property 5

Pass through thin metal foils.

Anode Rays Property 6

Produce ionization in gases.

Charge of a Proton

+1.602 x 10^-19 coulomb

Mass of a Proton

1.675 × 10^-27 kg or 1.0072 amu

Mass of Neutron vs. Electron

Mass of neutron is approximately 1840 times the mass of electron.

K.E. = (1 / 4πε₀) * (2Ze² / r)

Equation related to kinetic energy and distance of closest approach.

R = R₀A^(1/3)

Formula relating nuclear radius to mass number.