Question : Huygen’s concept of secondary wave
A. allows us to find the focal length of a thick lens
B. is a geometrical method to find a wavefront
C. is used to determine the velocity of light
D. is used to explain polarisation
Answer:B
Question : Huygen’s concept of secondary wave
A. allows us to find the focal length of a thick lens B. is a geometrical method to find a wavefront C. is used to determine the velocity of light D. is used to explain polarisation