Which of the following ray diagrams is not correct?

Options

A.
B.
C.
D.

Answer

To determine which ray diagram is not correct, we will analyze each of the four provided diagrams step by step.

### Step 1: Analyze the First Ray Diagram (Concave Mirror)
- In the first diagram, a ray of light is coming from the focus of a concave mirror and is reflected parallel to the principal axis.
- This is correct because, according to the laws of reflection, a ray that originates from the focus of a concave mirror will reflect off the mirror and travel parallel to the principal axis.

### Step 2: Analyze the Second Ray Diagram (Convex Mirror)
- The second diagram shows a ray of light approaching a convex mirror.
- A key point to note is that the focus and center of curvature for a convex mirror are located behind the mirror, not in front.
- The ray of light should appear to diverge from the focus when it strikes the mirror, but the diagram incorrectly shows it converging towards the focus.
- Therefore, this diagram is incorrect.

### Step 3: Analyze the Third Ray Diagram (Concave Mirror)
- In the third diagram, a ray of light is coming from the center of curvature of a concave mirror.
- When a ray of light strikes the mirror at the center of curvature, it reflects back along its original path.
- This is correct according to the principles of reflection.

### Step 4: Analyze the Fourth Ray Diagram (Concave Mirror)
- The fourth diagram shows a ray of light coming parallel to the principal axis and reflecting off a concave mirror to meet at the focus.
- This is also correct, as rays parallel to the principal axis converge at the focus after reflection from a concave mirror.

### Conclusion
- After analyzing all four diagrams, we find that the second diagram (Convex Mirror) is the only incorrect one.

### Final Answer
The ray diagram that is not correct is the second one, which represents a convex mirror.

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