Reflection and Refraction Experiments

The video tutorial explores the concepts of reflection and refraction through an experiment involving a Perspex block. Key terms such as angles of incidence, reflection, and refraction are defined. The experiment setup is demonstrated, followed by conducting the experiment to observe how changing the angle of incidence affects the angles of reflection and refraction. Measurements are taken, and conclusions are drawn, highlighting that the angle of reflection is approximately equal to the angle of incidence, and the angle of refraction is always smaller than the angle of incidence when light passes from air to Perspex.

What is the angle between the incident ray and the normal line called?

• Angle of deviation

• Angle of incidence

• Angle of reflection

• Angle of refraction

Why is a white sheet of paper used in the experiment?

• To absorb the light rays

• To make the light rays more visible

• To refract the light rays

• To reflect the light rays

What is the purpose of drawing a normal line on the Perspex block?

• To define the angles of incidence, reflection, and refraction

• To measure the length of the block

• To mark the center of the block

• To indicate the direction of the light source

During the experiment with a 30-degree angle of incidence, what was the measured angle of reflection?

• 30 degrees

• 29 degrees

• 18 degrees

• 45 degrees

What was the angle of refraction when the angle of incidence was 30 degrees?

• 45 degrees

• 18 degrees

• 29 degrees

• 30 degrees

In the experiment with a 45-degree angle of incidence, what was the angle of reflection?

• 29 degrees

• 45 degrees

• 30 degrees

• 46 degrees

What was the angle of refraction when the angle of incidence was 45 degrees?

• 45 degrees

• 30 degrees

• 46 degrees

• 28 degrees

What conclusion can be drawn about the angle of reflection in relation to the angle of incidence?

• The angle of reflection is unrelated

• The angle of reflection is approximately equal

• The angle of reflection is always less

• The angle of reflection is always greater

What is observed about the angle of refraction compared to the angle of incidence when light passes from air to Perspex?

• The angle of refraction is equal

• The angle of refraction is greater

• The angle of refraction is smaller

• The angle of refraction is unrelated

What happens to the refracted ray as it passes through the Perspex block?

• It remains straight

• It reflects back

• It bends towards the normal

• It bends away from the normal