1 THE LEAST ANGLE OF DEVIATION OF A GLASS PRISM IS EQUAL TO ITS REFRACTING ANGLE THE REFRACTIVE INDEX - Physics - Ray optics Optical instrument

Question

1 THE LEAST ANGLE OF DEVIATION OF A GLASS PRISM IS EQUAL TO ITS
REFRACTING ANGLE THE REFRACTIVE INDEX OF GLASS IS 1 5 THEN THE
ANGLE OF PRISM IS?

2 THE ANGLE OF MINIMUM DEVIATION FOR A 75 DEGREE PRISM OF DENSE
GLASS IS FOUND TO BE 45 DEGREE WHEN IN AIR AND 15 DEGREE WHEN
IMMERSED IN LIQUID THE REFRACTIVE INDEX OF THE LIQUID IS?

Rupak Bhattacharya · Accepted Answer

1
     We knowμ12= sin A+D2sin A2here A=D1
5=sinAsin A2=2cosA2A=cos-1(34)2
   μairμliq=sin A+Dair2sin A+Dliq21μliq=sin(60)sin(45)=1
22μliq=0
816  , refractive index of the liquid