A: The speed of light in water is not same as that in flowing water.
R: The speed of light in water is not independent of the relative motion between the observer and the medium.

Options

A. IF both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark(2)
C. IF Assertion is true statement but Reason is false then mark(3)
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To solve the question, we need to analyze the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states that "the speed of light in water is not the same as that in flowing water." This implies that the speed of light changes when it travels through water that is in motion compared to still water.

**Hint:** Consider how the speed of light is affected by the medium through which it travels.

### Step 2: Understand the Reason
The reason states that "the speed of light in water is not independent of the relative motion between the observer and the medium." This means that the speed of light can vary depending on the movement of the medium (in this case, water) relative to the observer.

**Hint:** Think about how the motion of the medium can affect the path and speed of light.

### Step 3: Analyze the Relationship Between Assertion and Reason
Both the assertion and the reason are linked. When light travels through still water, it has a certain speed, which is slower than in air due to the refractive index of water. However, when water is flowing, the relative motion between the light and the moving water alters the effective speed of light observed.

**Hint:** Reflect on how the bending of light occurs due to refraction and how the motion of the medium influences this bending.

### Step 4: Conclusion
Both the assertion and the reason are correct. The assertion accurately describes the difference in light speed in still versus flowing water, and the reason provides a valid explanation for this phenomenon by highlighting the dependence of light speed on the motion of the medium.

**Final Answer:** Both assertion and reason are correct, and the reason is a correct explanation of the assertion.