Assertion In front of a concave mirror, a point object is placed between focus and centre of curvature. If a glass slab is placed between object and mirror, then image from mirror may become virtual.
Reason Glass slab always makes a virtual image of a real object.

Options

A. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B. If both Assertion and Reason are true but Reason is not correct explanation of Assertion.
C. If Assertion is true but Reason is false.
D. If Assertion is false but Reason is true.

Explanation

To solve the assertion and reason question regarding the behavior of a concave mirror and the effect of a glass slab, we can break it down into the following steps:

### Step 1: Understand the Position of the Object
- A point object is placed between the focus (F) and the center of curvature (C) of a concave mirror. In this position, the concave mirror will produce a real and inverted image.

### Step 2: Analyze the Effect of the Glass Slab
- When a glass slab is placed between the object and the mirror, it introduces a shift in the apparent position of the object. The light rays passing through the glass slab will bend due to refraction, effectively making the object appear closer to the mirror.

### Step 3: Determine the New Position of the Object
- The introduction of the glass slab shifts the apparent position of the object towards the mirror. If this shift is significant enough, it can move the object from its original position (between F and C) to a position between the optical center (O) and the focus (F).

### Step 4: Identify the Type of Image Formed
- If the object is now located between the optical center (O) and the focus (F), the concave mirror will produce a virtual image. This occurs because, in this range, the rays diverge after reflecting, and the brain extrapolates these rays backward to form a virtual image.

### Step 5: Evaluate the Assertion and Reason
- The assertion states that the image may become virtual when a glass slab is placed between the object and the mirror. This is true because the glass slab can shift the object’s position into the virtual image range.
- The reason states that a glass slab always makes a virtual image of a real object. This is false, as the glass slab does not always create a virtual image; it depends on the object's position relative to the optical center and focus.

### Conclusion
- Therefore, the assertion is true, while the reason is false.

### Final Answer
- The correct conclusion is that the assertion is true and the reason is false.

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