Assertion : A normal body can radiate energy more than a perfectly black body.
Reason : A perfectly black body is always black in colour.

Options

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

Explanation

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

### Step 1: Understand the Assertion
The assertion states that "A normal body can radiate energy more than a perfectly black body."

- A perfectly black body is defined as an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence. It is also a perfect emitter of radiation, meaning it radiates energy at the maximum possible rate for a given temperature.
- A normal body, on the other hand, does not absorb or emit radiation perfectly.

**Conclusion for Step 1**: The assertion can be true under certain conditions, particularly when comparing bodies at different temperatures. For example, a normal body at a higher temperature can radiate more energy than a black body at a lower temperature.

### Step 2: Understand the Reason
The reason states that "A perfectly black body is always black in color."

- The term "black body" refers to its ability to absorb all wavelengths of radiation, not necessarily its color. In reality, a black body can emit radiation in various wavelengths and can appear to be of different colors depending on its temperature.
- For instance, the sun, which is a near-perfect black body, emits a wide spectrum of light and appears yellowish-white, not black.

**Conclusion for Step 2**: The reason is false because a perfectly black body does not have to be black in color; it can emit radiation across the spectrum and appear in various colors.

### Final Conclusion
- The assertion is true because a normal body can radiate more energy than a perfectly black body under certain conditions (different temperatures).
- The reason is false because a perfectly black body does not have to be black in color.

### Answer
The correct answer is: Assertion is true, but the reason is false.