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MHT CET202312 May 2023Evening ShiftPhysicsRay OpticsActual

A glass prism deviates the red and violet rays through 9^ and 11^ respectively. A second prism of equal angle deviates them through 11^ and 13^ respectively. The ratio of dispersive power of second nrism to first prism is

Options

  1. A5: 6
  2. B6: 5
  3. C9: 13
  4. D13: 9

Correct answer

A. 5: 6

Step-by-step solution

Dispersive Power of Prism: aligned & = _v- _r _y & _y= _v+ _r 2 = 11+9 2 aligned For first Prism, aligned ₁ & = 2(11-9) 11+9 & = 1 5 aligned For Second Prism: aligned ₂ & = 2(13-11) 13+11 & = 1 6 aligned Ratio: ₂ ₁ = 1 6 1 5 = 5 6 The ratio is 5: 6 .

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