Photochemistry deals with the absorption of

Emission of light stops immediately after removal of light source

Stark Einsteins law is applicable to

Quantum yield of a photo chemical reaction is always one.

Which of the following is a non-radiative transition between two electronic states of the same spin multiplicity.

Which of the following is a radiative transition between two electronic states of the same spin multiplicity and instantaneous process ?

which one of the following is a non-radiative transition between two iso-energetic vibrational levels belonging to electronic states of different spin multiplicity

____________ is a radiative transition between two electronic states of different spin multiplicity and occurs for a longer time even after the source is cut off.

What is the role of the uranyl ions added to oxalic acid solution in an chemical actinometer ?

If two unpaired electrons are present, the spin state is called

T1 to S0 transition is referred to as

S1 to S0 radiative transition is called

Example for quantam yield less than one