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NEET-XI-Physics

exam-2 year:2016

with Solutions -
Qstn# 102 Prvs-QstnNext-Qstn
  • #102
    An air bubble in a glass slab with refractive index
    1.5 (near normal incidence) is 5 cm deep when
    viewed from one surface and 3 cm deep when
    viewed from the opposite face. The thickness (in cm)
    of the slab is :-
    (1) 12
    (2) 16
    (3) 8
    (4) 10
    digAnsr:   1
    Ans : (1)
    Sol. -x
    O
    x

    x
    5cm=

    .....(i)
    x
    3cm

    =


    .....(ii)
    From (i) and (ii)
     = (5+3)= 12cm