The incidence angle of light should be less than critical angle for total internal reflection ?Group of answer choicesTrueFalse

The statement "The incidence angle of light should be less than the critical angle for total internal reflection" is False.

Explanation:

1. Understanding Total Internal Reflection: Total internal reflection occurs when a light ray travels from a medium with a higher refractive index to one with a lower refractive index (for example, from water to air).

2. Critical Angle: The critical angle is defined as the angle of incidence above which total internal reflection occurs. It is specific to the pair of media involved and can be calculated using Snell's Law: $\sin(\theta_c) = \frac{n_2}{n_1}$ where $\theta_c$ is the critical angle, $n_2$ is the refractive index of the second medium (lower n), and $n_1$ is the refractive index of the first medium (higher n).

3. Condition for Total Internal Reflection: For total internal reflection to take place, the angle of incidence must be greater than the critical angle. If the angle of incidence is less than the critical angle, the light will be refracted into the second medium instead of reflecting back.

4. Conclusion: Therefore, the correct condition for total internal reflection is that the incidence angle must be greater than the critical angle, not less.

Final Answer:

False. The incidence angle should be greater than the critical angle for total internal reflection to occur.