Refractive Index - Part 4 - The Disappearing Penny Trick

The video demonstrates an experiment to highlight the refractive index using a penny, a glass, and water. It explains how light bending makes the penny appear to disappear and reappear, referencing a previous video for further explanation. The experiment is safe and requires no protective gear. Observations show the penny's apparent movement due to light refraction.

What materials are required for the refractive index experiment?

• A penny, a mirror, and some water

• A penny, a tall transparent glass, and a flashlight

• A penny, a tall transparent glass, and some water

• A penny, a bowl, and some oil

What is the first step in the refractive index experiment?

• Observe the penny from a distance

• Place the penny inside the glass

• Place the penny underneath the glass

• Fill the glass with water

What happens to the penny when the glass is filled with water?

• It appears to disappear

• It breaks into pieces

• It changes color

• It floats to the top

What additional observation is made when viewing the penny from a different angle?

• The penny appears to sink

• The penny appears to rise to the top

• The penny changes shape

• The penny becomes invisible

What is the main cause of the penny's apparent movement in the experiment?

• The refractive index

• The color of the penny

• The density of the water

• The size of the glass