Detecting light energy is the function of :

Options

A. chemoreceptors
B. photoreceptors
C. mechanoreceptors
D. thermoreceptors

Explanation

To determine which receptor is responsible for detecting light energy, we can analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Receptors**: Receptors are specialized cells or structures that respond to specific types of stimuli. In this case, we are looking for a receptor that detects light energy.

2. **Analyzing Option A - Chemoreceptor**:
- Chemoreceptors are responsible for detecting chemical stimuli. They are involved in the senses of taste and smell. Since they do not respond to light, this option is incorrect.

3. **Analyzing Option B - Photoreceptor**:
- Photoreceptors are specialized receptors that respond to light. They are found in the retina of the eye and are crucial for vision. Since they specifically detect light energy, this option is correct.

4. **Analyzing Option C - Mechanoreceptor**:
- Mechanoreceptors respond to mechanical stimuli such as pressure, touch, and vibration. They do not detect light energy, so this option is incorrect.

5. **Analyzing Option D - Thermoreceptor**:
- Thermoreceptors are sensitive to temperature changes. They detect heat and cold but do not respond to light energy, making this option incorrect.

6. **Conclusion**: Based on the analysis, the receptor responsible for detecting light energy is the **Photoreceptor** (Option B).

### Final Answer:
The function of detecting light energy is performed by **B. Photoreceptor**.

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