Question

Assertion (A): Red light signals are used to stop the vehicles on the road.
Reason (R): Red coloured light is scattered the most so as to be visible from a large distance.

• A. Both (A) and (R) are true and (R) is the correct explanation of (A).
• B. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
• C. (A) is true, but (R) is false.
• D. (A) is false, but (R) is true.

Answer 1

The Correct Option is C

Step 1: Analyze Assertion (A): The assertion posits that red light signals mandate vehicle stoppage on roadways. This is accurate; in traffic management, red light universally signifies "stop." Red's selection is attributed to its superior visibility and its established association with caution.

Step 2: Analyze Reason (R): The provided reason claims that red light scatters the most, thus ensuring visibility over long distances. This statement is factually incorrect. Although red light possesses a longer wavelength, it undergoes less scattering than shorter wavelengths like blue or violet. Rayleigh scattering affects shorter wavelengths more significantly, which accounts for the sky's blue appearance.

Step 3: Evaluate Assertion-Reason Relationship: - Assertion (A) is true: Red light signals are indeed used to halt vehicles on roads.
- Reason (R) is false: Red light does not scatter the most; it scatters less than colors such as blue.

Step 4: Final Determination: The correct evaluation is: (A) is true, but (R) is false.