Dear student,
The Factors affecting the angle of deviation are:
1)Angle of Incidence .
As the angle of incidence increases , first the angle of deviation decreases and becomes minimum for a particular value of angle of incidence then again increases.
2)Angle of Prism.
For a given angle of incidence the angle of deviation increases with increase in the angle of Prism.
3)Refractive Index of the Prism material.
For a given angle of incidence , the angle of deviation increases with increase in the refractive index of the Prism material.
4)Wave length of Light.
For a given angle of incidence the angle of deviation decreases with in increase of wave length of light.
Regards,