Question

precautions for to find refractive index of a prism

Answer 1

Pins should be fixed perfectly vertical ii)while fixing the pins in line with the refractive or reflective images of incident rays care should be taken for the parallax error.iii) there should be some space between the pins iv)pins should not be disturbed during the experiment v)Same edge of the prism should be taken as vertex A for all the observations vi) Clean both the faces AB and AC of the prism proper before taking the readings.

Answer 2

Answer- The above question is related to Physics practical of 'Finding refractive index of a glass prism'.

Given question: Write precautions to find refractive index of a prism.

Answer: 1. Angle of incidence should be taken between 30° and 60°.

2. Boundary of the prism ABC should be drawn with a sharp pencil.

3. Angle of the prism (A) should be same throughout.

4. Point pricks should be immediately encircled after removing them.

5. All pins must be fixed vertically and they should be well-illuminated.