The incident ray, reflected ray and the outward drawn normal are denoted by the unit vectors a , b a n d c  respectively. Then choose the correct relation for these vectors.

Option 1 -

b = a c

Option 2 -

b = a + 2 c

Option 3 -

b = 2 a + c

Option 4 -

b = a 2 ( a . c ) c

0 3 Views | Posted a month ago
Asked by Shiksha User

  • 1 Answer

  • V

    Answered by

    Vishal Baghel | Contributor-Level 10

    a month ago
    Correct Option - 4


    Detailed Solution:

    r ^ i ^ = 2 c o s θ n ^ . . . . . . ( 1 )

    i ^ . n ^ = c o s θ . . . . . . ( 2 )

    r ^ = i ^ 2 ( i ^ . n ^ ) n ^

    b = a 2 ( a . c ) c

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f = 15

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1 2 0 = ( 1 . 5 1 ) ( 2 R )

R = 20cm

1 f ' = ( 1 . 5 1 . 6 1 ) ( 2 R )            

= 1 1 6 × 2 2 0                  

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