Plss help out
Dear Student , Least count of spectrometer = 1 main scale division - 1 vernier scale division = 1/2 - 29/60 = 1/60 Now the angle of the prism from the above data: Main scale reading : 58.5 degree Vernier scale reading : 09 divisions= 9* Least Count° 9*1/60 = 58.5 + 9*(1/60) = 58.5 + 9/60 = 58.5 + 0.15 = 58.65 degree Therefore, option C is correct. Regards