is travelling at the speed of light.

diffracts through a narrow slit.

does not behave as a particle.

does not display wave properties.

doubled

halved

increase four fold

the same

Cannot be determined

photocurrent decreases immediately

photocurrent increases immediately

no change in the photo current

photocurrent increases gradually

photocurrent decreases gradually

Ground state energy level

All of the mentioned

Excited state energy level

Initial state energy level

has a few exceptions, but they are not important at a quantum level.

combines both the particle and wave characters of the electron into a single statement.

suggests that the uncertainty principle is not correct after all.

implies that the quantum number, n, is the sum of all the orbits minus the length of the de Broglie wave.

hf should be equal to the energy difference

hf should be greater than the energy difference

None of the mentioned

hf should be smaller than the energy difference

Intermediate levels

Lower energy level to a higher one

All of the mentioned

Higher energy level to a lower one

gains energy.

jumps from a higher to a lower energy level.

turns into gamma radiation.

is absorbed by the nucleus.

h/f

1/hf

f/h

hf