Explain Huygens principle of a secondary wavelets and on the basis of this principle establish the law of refraction or reflection
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let the wave front take time t to reach on poinf z so BZ=V1T
And in second medium AL=V2T
IN TRIANGLE ABZ
SIN I=v1t /AZ....................................... (1)
AND IN TRIANGLE ALZ
SIN R=V2T/AZ.......................................(2)
BY DIVIDEING 1 BY 2
SIN I/SIN R=V1T/V2T
SIN I /SIN R = V1/V2=1MU2
IT IS SNELLS LAW
And in second medium AL=V2T
IN TRIANGLE ABZ
SIN I=v1t /AZ....................................... (1)
AND IN TRIANGLE ALZ
SIN R=V2T/AZ.......................................(2)
BY DIVIDEING 1 BY 2
SIN I/SIN R=V1T/V2T
SIN I /SIN R = V1/V2=1MU2
IT IS SNELLS LAW
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