Question: how does the total amount of energy present before an energy transformation compare to the total amount of energy present afterward? a: the energy before is equal to the energy afterward. b: the mass before is equal to the mass afterward. c: the energy before is greater than the energy afterward. d: the energy afterward is greater than the energy before.

The correct option is: (A) The energy before is equal to the energy afterward.

Explanation:
According to the law of conservation of Energy, energy can neither be created nor destroyed; it can only be transformed into one form or another. It means that the total initial energy must be equal to the total final energy of the system. By considering this law, we can infer that the energy before is equal to the energy afterward.

Wavelength divides in half and speed stays the same.

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