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Enter the angle of incidence and the angle of emergence, and the calculator will determine the angle of deviation.
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The angle of deviation calculator determines the deviation angle by using the angle of incidence and angle of emergence of light passing through a prism.
The angle of deviation in a prism depends on the prism’s material and geometry. It is calculated as the sum of the angle of incidence and the angle of emergence, minus the prism’s angle.
Angle of Deviation = Angle of Incidence + Angle of Emergence - Prism Angle
D = I + E - A
Suppose a ray of light strikes a prism with an angle of incidence (I) of 10°, an angle of emergence (E) of 35°, and a prism angle (A) of 35°. Calculate the angle of deviation (D).
I = 10°, E = 35°, A = 35°, D = ?
Using the formula D = I + E - A, we substitute the values:
D = 10 + 35 - 35
D = 10°
Angle of Deviation = 10°
The deviation angle depends on several variables:
Our calculator is easy to use. Enter the required values, and it instantly provides the angle of deviation along with the detailed solution.
Input:
Output:
Yes, if the refracted light bends downward, the deviation can be negative. The calculator displays both upward and downward deviations.
The maximum deviation occurs when the angle of incidence reaches 90°.
Violet light deviates the most because it has the shortest wavelength among visible colors.
Sources: Wikipedia – Minimum deviation; Toppr.com – Angle of deviation and influencing factors
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