Question

When glass block is tilted by ‘i’ in optical arrangement with a graduated scale, then find out the displacement of the ray. Given, width=5 mm, refractive index of glass block=1.5 and rotation is 10 mins.

(a) 0.05 mm

(b) 0.005 mm

(c) 0.0005 mm

(d) 0.00005 mm

I got this question in quiz.

Query is from Graduated Scales in section Linear Measurements of Engineering Metrology

Answer 1

Correct option is (b) 0.005 mm

Explanation: For very small angles, h=wi(Ref index-1/Ref index).