The process in which excess energy is lost by light waves is called

Options

A. Fluorescence
B. Photooxidation
C. Photolysis
D. Photophosphorylation.

Answer

To solve the question "The process in which excess energy is lost by light waves is called," we will analyze the given options one by one.

### Step-by-Step Solution:

1. **Understand the Question**: The question is asking for a specific process related to light waves where excess energy is lost.

2. **Evaluate the Options**:
- **Option A: Fluorescence**:
- Fluorescence occurs when a molecule absorbs light and then re-emits it, often at a longer wavelength. This process can be seen as a way of losing excess energy in the form of light. Thus, this option seems plausible.

- **Option B: Photo Oxidation**:
- Photo oxidation refers to the process where light causes the oxidation of a substance, typically involving the loss of electrons. This does not specifically relate to the loss of excess energy by light waves, so this option is incorrect.

- **Option C: Photolysis**:
- Photolysis is the process where light energy is used to break down molecules, such as the splitting of water in photosynthesis. This does not refer to the loss of excess energy by light waves, making this option incorrect as well.

- **Option D: Photophosphorylation**:
- Photophosphorylation is the process of ATP synthesis that occurs in the presence of light. This process does not describe the loss of excess energy by light waves, so this option is also incorrect.

3. **Conclusion**: After evaluating all the options, the correct answer is **Option A: Fluorescence**, as it describes the process in which excess energy is lost by light waves.

### Final Answer:
The process in which excess energy is lost by light waves is called **Fluorescence**.

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