GCSE Physics - Reflection #62

The video tutorial explains the concept of reflection, focusing on how waves interact with boundaries. It covers the three possible outcomes when a wave hits a boundary: absorption, transmission, and reflection. The tutorial emphasizes reflection, detailing how to draw ray diagrams and the principle that the angle of incidence equals the angle of reflection. It also distinguishes between specular and diffuse reflection, explaining how surface texture affects the direction of reflected rays.

What happens to a wave when it is absorbed by a material?

• It is reflected back.

• It is transmitted through.

• It disappears completely.

• Its energy is transferred to the material.

Which of the following is true about the angle of incidence and the angle of reflection?

• They are unrelated.

• The angle of incidence is always greater.

• They are always equal.

• The angle of reflection is always greater.

What is the first step in drawing a ray diagram?

• Draw the boundary between materials.

• Draw the reflected ray.

• Draw the normal line.

• Measure the angle of incidence.

In a ray diagram, what is the normal?

• A line parallel to the surface.

• A line perpendicular to the surface.

• A line that bisects the angle of incidence.

• A line at 45° to the surface.

What type of reflection occurs on a perfectly smooth surface?

• Scattered reflection

• Specular reflection

• Random reflection

• Diffuse reflection

Why can't you see your reflection in a piece of paper?

• The paper reflects light in a single direction.

• The paper's surface causes diffuse reflection.

• The paper transmits all light.

• The paper absorbs all light.

What is the effect of a rough surface on the direction of reflected light?

• It reflects light in a single direction.

• It scatters light in multiple directions.

• It absorbs all the light.

• It transmits light through the surface.