Question

Assertion : Out of Infrared and radio waves, the radio waves show more diffraction effect.

Reason (R): Radio waves have greater frequency than infrared waves.

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

Hint:

Radio waves show more diffraction effects because of their longer wavelengths, not due to their frequency.

Answer 1

The Correct Option is C

To assess the provided Assertion and Reason, each statement will be examined:

Assertion: Radio waves exhibit a more significant diffraction effect than infrared waves.

Diffraction is more pronounced when the wave's wavelength is similar to or greater than the size of the obstacle or aperture it encounters. Radio waves possess longer wavelengths than infrared waves, facilitating easier diffraction around obstructions. Consequently, the Assertion is accurate.

Reason (R): Radio waves possess a higher frequency than infrared waves.

Frequency and wavelength are inversely related for waves, as per the equation:

\(v = fλ\)

Here, v represents the wave speed (a constant in a vacuum), f denotes frequency, and λ signifies wavelength. In reality, radio waves have lower frequencies than infrared waves. Therefore, the Reason is incorrect.

In summary, the Assertion is true, while the Reason is false.