Assertion`:` When an objecct is placed between two plane parallel mirrorrs, then all the images found are of equal intensity.
Reason`:` In case of plane parallel mirrorrs, only two images are possible.

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 the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer

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

### Step 1: Understanding the Assertion
The assertion states that when an object is placed between two plane parallel mirrors, the images formed are of equal intensity.

**Explanation**:
When an object is placed between two plane mirrors, the light from the object reflects back and forth between the mirrors. Each reflection produces an image, and because the mirrors are parallel, the distance from the object to each image remains the same for all images formed. As a result, all images will have the same intensity because they are formed by the same light source (the original object) and undergo the same number of reflections.

### Step 2: Understanding the Reason
The reason states that in the case of plane parallel mirrors, only two images are possible.

**Explanation**:
This statement is incorrect. In fact, when an object is placed between two plane parallel mirrors, an infinite number of images can be formed. Each image acts as an object for the other mirror, leading to a continuous generation of images. Therefore, the reason provided is false.

### Step 3: Conclusion
Now, we can conclude:
- The assertion is **true**: All images formed are of equal intensity.
- The reason is **false**: There are not just two images; there are infinitely many images formed.

Thus, the correct answer is that the assertion is true, but the reason is false.

### Final Answer
Assertion is true, but the reason is false.

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