A ray of light when travels from ................ medium it bends away from the normal

Options

A. rarer to rarer
B. denser to denser
C. rarer to denser
D. denser to rarer

Explanation

To solve the question, "A ray of light when travels from __________ medium it bends away from the normal," we need to analyze the behavior of light as it passes between two different media. Here’s a step-by-step solution:

### Step 1: Understand the Concept of Refraction
Refraction occurs when light travels from one medium to another and changes speed, which causes it to change direction. The amount of bending depends on the refractive indices of the two media involved.

**Hint:** Remember that light bends towards the normal when it enters a denser medium and away from the normal when it enters a rarer medium.

### Step 2: Identify the Refractive Indices
Let’s denote the refractive index of the first medium as N1 and the second medium as N2. If N1 > N2, then the first medium is denser than the second medium. Conversely, if N1 < N2, the first medium is rarer than the second medium.

**Hint:** A medium with a higher refractive index is considered denser, while a medium with a lower refractive index is considered rarer.

### Step 3: Apply Snell's Law
According to Snell's Law, the relationship between the angles of incidence (i) and refraction (r) is given by:
\[ N1 \sin(i) = N2 \sin(r) \]

**Hint:** Use Snell's Law to relate the angles and refractive indices when light passes from one medium to another.

### Step 4: Analyze the Bending of Light
When light travels from a denser medium (N1) to a rarer medium (N2), it bends away from the normal. This means that the angle of refraction (r) will be greater than the angle of incidence (i).

**Hint:** If the light is bending away from the normal, it indicates that it is moving from a denser medium to a rarer medium.

### Step 5: Conclusion
Based on the analysis, the correct answer to the question is that a ray of light bends away from the normal when it travels from a denser medium to a rarer medium.

**Final Answer:** The ray of light bends away from the normal when it travels from **denser to rarer** medium.