Huygens Principle MCQ Quiz - Objective Question with Answer for Huygens Principle - Download Free PDF
Last updated on Apr 10, 2025
Latest Huygens Principle MCQ Objective Questions
Huygens Principle Question 1:
A circular disc is placed in front of a narrow source. When the point of observation is \(2\ m\) from the disc, then it covers first HPZ. The intensity at this point is \(I\). When the point of observation is \(25\ cm\) from the disc then intensity will be
Answer (Detailed Solution Below)
Huygens Principle Question 1 Detailed Solution
\(I = R_2^2\)
Given \(n_1 b_1 = n_2 b_2 \Rightarrow 1 \times 200 = n_2 \times 25\)
Therefore, \(n_2 = 8\) HPZ
Therefore, \(I = \left(\dfrac{R_9}{R_2}\right)^2\)
=\(\left(\dfrac{R_9}{R_8} \times \dfrac{R_8}{R_7} \times \dfrac{R_7}{R_6} \times \dfrac{R_6}{R_5} \times \dfrac{R_5}{R_4} \times \dfrac{R_4}{R_3} \times \dfrac{R_3}{R_2} \times \dfrac{R_2}{R_2}\right)^2\)
=\(\left(\dfrac{R_9}{R_2}\right)^2 I\)
Top Huygens Principle MCQ Objective Questions
Huygens Principle Question 2:
A circular disc is placed in front of a narrow source. When the point of observation is \(2\ m\) from the disc, then it covers first HPZ. The intensity at this point is \(I\). When the point of observation is \(25\ cm\) from the disc then intensity will be
Answer (Detailed Solution Below)
Huygens Principle Question 2 Detailed Solution
\(I = R_2^2\)
Given \(n_1 b_1 = n_2 b_2 \Rightarrow 1 \times 200 = n_2 \times 25\)
Therefore, \(n_2 = 8\) HPZ
Therefore, \(I = \left(\dfrac{R_9}{R_2}\right)^2\)
=\(\left(\dfrac{R_9}{R_8} \times \dfrac{R_8}{R_7} \times \dfrac{R_7}{R_6} \times \dfrac{R_6}{R_5} \times \dfrac{R_5}{R_4} \times \dfrac{R_4}{R_3} \times \dfrac{R_3}{R_2} \times \dfrac{R_2}{R_2}\right)^2\)
=\(\left(\dfrac{R_9}{R_2}\right)^2 I\)