Ques-2) Huygens’ concept of secondary waves…
A. Allows us to find the focal length of a thick lens
B. Gives us the magnifying power of a microscope
C. Is a geometrical method to find a wave front
D. Is used to determine the velocity of light
Answer:C
Ques-2) Huygens’ concept of secondary waves…
A. Allows us to find the focal length of a thick lens B. Gives us the magnifying power of a microscope C. Is a geometrical method to find a wave front D. Is used to determine the velocity of light