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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 is the angle between the original path of an incident light ray and its final direction after passing through a prism or another optical medium.
The general formula for the angle of deviation (\(\delta \)) in a prism is:
\(\delta =i+e-A\)
Where:
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:
To use this online calculator, you need to follow the simple steps below:
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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