describe the deviation by a prism ,in your own words,don't send from google,describe it through drawing?
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Answer:
In a prism, the angle of deviation displaystyle delta delta decreases with increase in the angle of incidence displaystyle i} i) up to a particular angle. This angle of incidence where the angle of deviation in a prism is minimum is called the Minimum Deviation Position of the prism and that very deviation angle is known as the Minimum Angle of Deviation (denoted by {\displaystyle \delta _{min}} {\displaystyle \delta , {\displaystyle D_{\lambda }} {\displaystyle D or display style D_ displays style .
In Minimum Deviation, the refracted ray in the prism is parallel to its base. In other words, the light ray is symmetrical about the axis of symmetry of the prism.[1][2][3] Also, the angles of refractions are equal i.e. {\displaystyle r_{1}=r_{2}} {\display style r_{1}=r_{2}}. And, the angle of incidence and angle of emergence equal each other ( {\displaystyle i=e} {\displaystyle i=e}). This is clearly visible in the graph in the next section.
