Assertion: A red object appears dark in the yellow light .
Reason: The red colour is scattered less.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are truw but reason is not correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Explanation

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

### Step 1: Analyze the Assertion
The assertion states that "A red object appears dark in yellow light."

- A red object appears red because it reflects red light and absorbs other colors.
- In yellow light, which is a combination of red and green light, the red object will reflect the red component but will absorb the green component.
- Since the red object absorbs the green light and reflects only the red light, it will not appear bright. Therefore, it will appear dark in yellow light.

### Conclusion for Assertion
The assertion is **true** because a red object reflects red light and absorbs other colors, making it appear dark in yellow light.

### Step 2: Analyze the Reason
The reason states that "The red color is scattered less."

- According to Rayleigh's scattering, the amount of scattering is inversely proportional to the fourth power of the wavelength of light.
- Red light has a longer wavelength compared to other colors (like blue or green), which means it is scattered less.
- However, this fact about scattering does not directly explain why a red object appears dark in yellow light.

### Conclusion for Reason
The reason is also **true** because red light is indeed scattered less due to its longer wavelength.

### Final Conclusion
Both the assertion and the reason are true, but the reason does not explain the assertion. Therefore, the correct answer is that both statements are true, but the reason is not the correct explanation of the assertion.

### Final Answer
Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.