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Geometrical Optics question

2022 · 25 Jul · Shift 1 · Q56
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  5. /2022 · 25 Jul · Shift 1 · Q56

Geometrical Optics question

2022 · 25 Jul · Shift 1 · Q56

JEE MainPhysicsGeometrical OpticsMCQ+4 / −1
Time taken by light to travel in two different materials AAA and BBB of refractive indices μA\mu_{A}μA​ and μB\mu_{B}μB​ of same thickness is t1t_{1}t1​ and t2t_{2}t2​ respectively. If t2−t1=5×10−10t_{2}-t_{1}=5 \times 10^{-10}t2​−t1​=5×10−10 s and the ratio of μA\mu_{A}μA​ to μB\mu_{B}μB​ is 1:21: 21:2. Then, the thickness of material, in meter is: (Given vAv_{\mathrm{A}}vA​ and vBv_{\mathrm{B}}vB​ are velocities of light in AAA and BBB materials respectively.)
  1. A
    5×10−10 vA m5 \times 10^{-10} \,v_{\mathrm{A}}\, \mathrm{m}5×10−10vA​m
  2. B
    5×10−10 m5 \times 10^{-10} \mathrm{~m}5×10−10 m
  3. C
    1.5×10−10 m1.5 \times 10^{-10} \mathrm{~m}1.5×10−10 m
  4. D
    5×10−10 vB m5 \times 10^{-10} \,v_{\mathrm{B}} \,\mathrm{m}5×10−10vB​m
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