Question

Two students are situated in a room 10 m high, they are separated by 7 m high partition wall. The students are unable to see each other even though they can converse easily. But they know that both light and sound waves can bend around the obstacles. So they were interested to know scientific cause of such phenomena. Then they went to their friend Neelam who convinced them with basic facts. 

(a) What are the values shown by Neelam ? 

(b) How did Neelam convince them such basic facts ?

Answer 1

(a) The values shown by Neelam are : 

(i) high degree of general awareness, 

(ii) ability to convince someone, 

(iii) thinking skills, and 

(iv) concern for her friend. 

(b) The size of the obstacle should be comparable to the wavelength of the light wave in order to obtain an observable diffraction pattern. The size of the wall is 7 m, which is comparable enough with sound wave but not with the light wave. So, the two students cannot see each other but can talk to each other