Why Is Light a Source of Energy

question 81

Multiple Choice

Why is light a source of energy?

• A) It excites an electron within a pigment molecule, which then serves as a source of light energy that can be used for work.
• B) It excites an electron within a pigment molecule, which then serves as a source of heat energy that can be used for work.
• C) It excites an electron within a pigment molecule, which then serves as a source of potential energy that can be used for work.
• D) It excites an electron within a pigment molecule, which then serves as a source of kinetic energy that can be used for work.

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Definitions:

Interest Rate

The segment of a loan that incurs interest charges for the borrower, usually delineated as an annual percentage of the loan's remaining amount.

Present Discounted Value

The present value of a future amount of money or sequence of cash inflows, calculated using a designated rate of return.

Formula

A mathematical relationship or rule expressed in symbols.

Present Value

The present worth of a sum of money or series of cash flows expected in the future, calculated using a particular rate of return.