Understanding Critical Angle and Total Internal Reflection

What phenomenon occurs when light travels from a denser to a less dense medium at an angle greater than the critical angle?

• Dispersion

• Refraction

• Total internal reflection

• Diffraction

What is the critical angle for the water to air boundary?

• 90 degrees

• 61 degrees

• 48 degrees

• 24 degrees

What happens to light when it hits a boundary at an angle less than the critical angle?

• It undergoes both reflection and refraction

• It is absorbed by the boundary

• It undergoes only refraction

• It undergoes only reflection

What is the significance of the critical angle in the context of light behavior at a boundary?

• It determines the speed of light

• It changes the wavelength of light

• It defines the angle at which light refracts along the boundary

• It affects the color of light

Which formula is used to calculate the critical angle?

• Inverse sine of the ratio of indices of refraction

• Pythagorean theorem

• Snell's Law

• Newton's second law

When calculating the critical angle, why must the index of refraction of the denser medium be greater?

• To ensure the angle of refraction is 90 degrees

• To prevent total internal reflection

• To make the calculation easier

• To ensure the ratio is less than 1

What is the result of reversing the indices of refraction when calculating the critical angle?

• The light speed changes

• The calculation becomes invalid

• The critical angle becomes larger

• The critical angle becomes smaller

What is the critical angle for the diamond to air boundary?

• 48.8 degrees

• 61 degrees

• 90 degrees

• 24.4 degrees

In the context of critical angle, what does the term 'TIR' stand for?

• Total internal refraction

• Total internal reflection

• Total incident reflection

• Total incident refraction

Why is the cut of a diamond important for its brilliance?

• It ensures total internal reflection occurs

• It affects the color of the diamond

• It changes the diamond's weight

• It alters the diamond's hardness