Laws of reflection||proof|| Huygens principle|| STD 12 Physics||sky physics||Tamil

[purushothamanr]

thank u sir .I had many confusions int his topic. After seeing your video it got cleared thank u soo much sir🤗

[jothehaathinarayanan]

Sir, i have a doubt. If we throw a stone, we can see multiple wavefronts moving at the same time and they'll reduce one by one. How can primary wavefront can go and secondary wavefront can come? If that's the case, why are we seeing many wavefronts at the same time? If the second wavefront is the secondary wavelet, how can all the points on the primary wavefront can act as the source of a single wavelet? And in the definition of huygen's principle, what does "the envelope to all these wavelets" mean? And also in the diagram in pg:55, what are the dotted lines around P Q and R called?
I thought that those dotted lines are secondary wavelets as each point on the first wavefront is a source and produces small wavefronts(secondary wavelets) around them. And the tangent to these secondary wavelets or the envelope of those wavelets form a new front and goes on in the same way till the respective maximum no.of wavefronts for the main source is reached.. but how? I can't understand clearly... what are those dotted lines around P Q and R called? Aren't they secondary wavelets? And isn't A'B' a new wavefront? What's the difference between wavefront and wavelets? And how many no. Of wavefronts can a point source produce? Is there any rule? And in the book, why did they take AB (the normal line to M) as a wavefront. And for the incident rays L and M, are they considered as point source at a finite distance at the point of incidence of L "A" and point of incidence of M "B"? Are we taking AB as incident wavefront because of the rule "The wavefront is always perpendicular to a ray"? Or are we taking AB as point on the primary wavefront from point source A? But if we take it in the second way, a point source produces disturbance in all directions, then why are we taking it in the direction of AB? 🤔🤔🤔 Seriously it's confusing. Everyone explained the topic given in book very clearly but none of them explained why are we taking AB as wavefront and why is it perpendicular to M and they didn't tell many whys.. You explained it somehave in detail. But i have these doubts. Can you please clear my doubts, sir ?🙏🙏🙏😟 please forgive me for typing this long, but i seriously can't understand these things. So please clear me sir🙁

[kakashisharinganytchannel]

Were have we used the Huygens principle sir

[muthuanu]

Sir 6.10.4 topic video podunga sir thks sir easy ya puridhu

[samuyuthas.m]

Sir niga board la teach panirukartha mattum exam la eluthuna full mark kudupangala sir