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        Angle of prism (mu = 1.5) is 30degree when monochromatic light is incident perpendicular to surface at what angle will it deviate?  a) 18degree 36minute b) 22degree 38minutec) 18degreed) 22degree 1minute
2 months ago

Arun
23322 Points
							Dear student We know thatn = sin i /sinr  1.5 = sin i / sin 30° sin i = 0.75 On solving i = 18°36' Hence Option A is correct.

2 months ago
Vikas TU
9756 Points
							Dear student The above explanation is very much incorrect , I feel sorry for that, You can use the formula $\frac{n(prism)}{n(air)}$This is given by {Sin(A+dm)/2} /  Sin(A/2) = $\frac{n(prism)}{n(air)}$Put all the values in it A = 30 , and dm is deviation here, So , the angle of deviation will comw out to be 15 degree and 16 minute , The ans given in the option is not matching , Ans is matching when tou will take (A+dm)/2 , it is 22 degree 83 minute. Hope this helps Good Luck

2 months ago
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### Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions