critical angle

ریشه

The word 'critical' comes from the Latin word 'criticus', meaning 'able to discern'. 'Angle' comes from the Latin word 'angulus', meaning 'corner' or 'angle'.

مثال

• The critical angle for light passing from water to air is approximately 48.6 degrees.
• When the angle of incidence is greater than the critical angle, total internal reflection occurs.
• The critical angle depends on the refractive indices of the two media.