Assessment: Refraction of Light

What is meant by "wave-particle duality" of light?

What causes light to bend when entering a new medium at an angle?

What does a HIGHER refractive index indicate about a medium?

Light travels from air (n₁ = 1.00) into a medium (n₂ = 1.6) at 35° (sin35° ≈ 0.574). Find sinθ₂.

Find the speed of light in a medium with refractive index 1.6 (c = 3 × 10⁸ m/s).

A medium has refractive index 1.4. Find its critical angle for light travelling into air.

Blue light has a wavelength of 450 nm (4.5 × 10⁻⁷ m). Find its frequency in a vacuum (c = 3 × 10⁸ m/s).

How do optical fibres keep light signals trapped inside the fibre core over long distances?

Why does diamond sparkle more brilliantly than a glass imitation of similar cut?

Why can total internal reflection only occur when light travels from a denser medium toward a less dense one, never the reverse?