Exploring Light and Motion

What is the law of reflection?

• The angle of incidence and reflection are unrelated to each other.

• The angle of reflection is always zero degrees.

• The angle of incidence is always greater than the angle of reflection.

• The angle of incidence equals the angle of reflection.

How does light behave when it hits a mirror?

• Light bends and refracts when hitting a mirror.

• Light is absorbed by the mirror completely.

• Light passes through a mirror without any change.

• Light reflects off a mirror according to the law of reflection.

What is the angle of incidence equal to?

• The angle of incidence is equal to the angle of reflection.

• The angle of incidence is equal to the angle of deviation.

• The angle of incidence is always 90 degrees.

• The angle of incidence is equal to the angle of refraction.

Define refraction of light.

• Refraction of light is the bending of light as it passes from one medium to another.

• Refraction of light is the absorption of light by a medium.

• Refraction of light is the scattering of light in all directions.

• Refraction of light is the reflection of light off a surface.

What happens to light when it passes from air to water?

• Light speeds up and changes color when it passes from air to water.

• Light bends and slows down when it passes from air to water.

• Light disappears completely when it enters the water.

• Light reflects off the surface and does not enter the water.

What is Snell's Law?

• Snell's Law describes the behavior of electric currents in circuits.

• Snell's Law is given by the formula n1 * sin(θ1) = n2 * sin(θ2), where n1 and n2 are the refractive indices of the two media, and θ1 and θ2 are the angles of incidence and refraction, respectively.

• Snell's Law is used to calculate the speed of sound in air.

• Snell's Law states that light travels in a straight line.

Explain the concept of total internal reflection.

• Total internal reflection is the absorption of light at the boundary of two media.

• Total internal reflection is the complete reflection of a wave at the boundary of two media when the angle of incidence exceeds the critical angle.

• Total internal reflection can happen at any angle of incidence.

• Total internal reflection occurs only in solids.

What is the difference between speed and velocity?

• Speed is scalar; velocity is vector (includes direction).

• Speed includes direction, while velocity does not.

• Velocity measures distance only.

• Speed is a type of velocity.

How is speed calculated?

• Speed = Distance / Time

• Speed = Time / Distance

• Speed = Distance + Time

• Speed = Distance - Time

What is the formula for calculating velocity?

• velocity = distance / speed

• velocity = displacement / time

• velocity = time / displacement

• velocity = acceleration x time