Sound and Light: Reflection and Refraction of Light

The video tutorial explains the phenomenon of light refraction, where light changes its path when moving between different transparent media. It guides viewers through an experiment to observe refraction using a glass block, laser pen, and other materials. The steps include setting up the experiment, directing a laser to observe the incident and emergent rays, and measuring angles to understand the refraction process. The experiment concludes with the observation that light paths change due to varying optical densities.

What is the phenomenon called when light changes its path due to a change in velocity between two mediums?

• Reflection

• Diffraction

• Dispersion

• Refraction

Which of the following materials is NOT required for the light refraction experiment?

• Protractor

• Rectangular glass block

• Magnifying glass

• Laser pen

What should you do after marking around the rectangular glass block on the paper?

• Color the glass with a pencil

• Direct a laser pen at the glass

• Draw a circle around the glass

• Measure the glass with a ruler

What is the angle of refraction measured in the experiment?

• 90°

• 34.5°

• 45°

• 60°

What conclusion can be drawn from the experiment about light traveling through different mediums?

• Light speed remains constant

• Light intensity increases

• Light path changes due to refraction

• Light becomes invisible