Experiment to determine the refractive index of a glass prism
FOCAL LENGTH = 9.5cm
i° e° d°

30 43 69
40 41 61
45 39 56
50 37 48
65 41 37
plot a graph of d° against i°
from the graph Determine;
(i) the minimum deviation and the corresponding angle of incidence
(ii) the maximum deviation and the corresponding angle of incidence
n=sin⁡(A+D÷2)÷(sinA÷2)
Determine the error in n and explain why it is not advisable to use small values of i° in performing this experiment.
THANK YOU SO MUCH

Question

Experiment to determine the refractive index of a glass prism
         FOCAL LENGTH = 9.5cm
i°	e°	d°

30	43	69
40	41	61
45	39	56
50	37	48
65	41	37
	plot a graph of d° against i°
	from the graph Determine;
	(i) the minimum deviation and the corresponding angle of incidence
	(ii) the maximum deviation and the corresponding angle of incidence
	n=sin⁡(A+D÷2)÷(sinA÷2)
	Determine the error in n and explain why it is not advisable to use small values of i° in performing this experiment. 
THANK YOU SO MUCH