The light stricking the retina generates nerve impulse.Which of the following options correctly describes the path of light ?

Options

A. Photosensory cells `to` Bipolar neurons `to` Ganglionic cells `to` Sensory nerves
B. Sensory nerves `to` Bipolar neurons `to` Ganglionic cells `to` Photosensory cells
C. Sensory nerves `to` Ganglionic cells `to` Bipolar neurons `to` Photosensory cells
D. Photosensory cells `to` Ganglionic cells `to` Bipolar neurons `to` Sensory nerves

Explanation

To solve the question regarding the path of light striking the retina and generating nerve impulses, we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding the Components**:
- The retina contains specialized cells known as **photosensory cells** (rods and cones) that detect light.

2. **Initial Detection of Light**:
- When light strikes the retina, it is detected by the **photosensory cells**. These cells convert the light into electrical signals (nerve impulses).

3. **Transmission to Bipolar Neurons**:
- The electrical signals generated by the photosensory cells are then transmitted to the **bipolar neurons**. These neurons act as intermediaries, relaying the signals from the photosensory cells to the next layer of cells.

4. **Reaching Ganglionic Cells**:
- The bipolar neurons pass the signals to the **ganglionic cells** (retinal ganglion cells). These cells are located near the inner surface of the retina and play a crucial role in processing the visual information.

5. **Formation of Action Potentials**:
- The ganglionic cells generate action potentials in response to the signals received from the bipolar neurons. This is a critical step as action potentials are the form of nerve impulses that can be transmitted to the brain.

6. **Transmission to Sensory Nerves**:
- Finally, the action potentials from the ganglionic cells travel along the **sensory nerves** to various regions of the brain, including the thalamus and visual cortex, where the visual information is processed.

### Conclusion:
The correct order of the path of light striking the retina and generating nerve impulses is:
- **Photosensory cells → Bipolar neurons → Ganglionic cells → Sensory nerves**.

Based on the options provided in the question, the correct answer is **Option D**.