In refraction of light through a prism the light ray:

Options

A. suffers refraction only at one face of the prism
B. emergest out from the prism in a direction parallel to the incident ray
C. bends at both the surface of the prism towards its base
D. bends at both the surfaces of the prism opposite to its base.

Answer

To solve the question regarding the refraction of light through a prism, we will analyze the behavior of a light ray as it passes through the prism.

### Step-by-Step Solution:

1. **Understanding the Prism**:
- A prism is a transparent optical element with flat, polished surfaces that refract light. It typically has a triangular shape.

2. **Incident Ray**:
- Consider a light ray incident on one face of the prism. The incident ray enters from a rarer medium (like air) into a denser medium (the glass of the prism).

3. **Refraction at the First Surface**:
- When the light ray enters the prism, it bends towards the normal due to the change in medium (from rarer to denser). This is described by Snell's Law.
- The light ray will change direction and travel inside the prism.

4. **Path Inside the Prism**:
- Inside the prism, the light ray travels towards the second face of the prism.

5. **Refraction at the Second Surface**:
- As the light ray reaches the second face of the prism, it moves from the denser medium (glass) to a rarer medium (air).
- According to Snell's Law, the light ray will bend away from the normal at this interface.

6. **Direction of Emergence**:
- After bending away from the normal, the light ray exits the prism. The overall effect of these two refractions is that the light ray bends towards the base of the prism at both surfaces.

7. **Conclusion**:
- Based on the analysis, the correct option is that the light ray "bends at both the surfaces of the prism towards its base."

### Final Answer:
The correct option is: **Bends at both the surfaces of the prism towards its base.**