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MHT CET202210 Aug 2022Morning ShiftPhysicsRay OpticsActual

A monochromatic ray of light travels through glass slab and water column. The number of waves in glass slab of thickness 4 ~cm is same as in water column of height 5 ~cm . If refractive index of glass is 5 3 then refractive index of water is

Options

  1. A4 3
  2. B5 4
  3. C6 5
  4. D3 2

Correct answer

A. 4 3

Step-by-step solution

Given thickness of glass slab =4 ~cm and height of water column =5 ~cm and refractive index of glass _g= 5 3 As number of waves is equal in both the glass and water medium, then according to their height and thickness, we can write aligned & _w _g = v_g v_w = thickness of glass time height of water column time & _w _g = 4 5 & _w= 4 5 ( 5 3 )= 4 3 aligned

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