Physics Experiments with Lasers and Liquids

What happens when a violet laser is shone into tonic water?

• It creates a bright green line.

• It creates a bright red line.

• It creates a bright yellow line.

• It creates a bright blue line.

What is considered the coolest use of lasers?

• Detecting gravitational waves

• Laser tag

• Cooling and controlling individual atoms

• Measuring the distance to the moon

What causes tonic water to glow under a violet laser?

• Presence of quinine

• Presence of sodium

• Presence of chlorine

• Presence of magnesium

In the oil and ice cube experiment, why does the ice cube float between two layers?

• The ice cube is equally dense as both oils.

• The ice cube is less dense than one oil and more dense than the other.

• The ice cube is more dense than both oils.

• The ice cube is less dense than both oils.

What percentage of Earth's water is used for human activities?

• 1%

• 5%

• 10%

• 20%

What is the process called when sodium acetate is supercooled and then crystallizes?

• Hot ice formation

• Condensation

• Evaporation

• Sublimation

Which of the following is NOT a use of sodium acetate?

• Making hot ice

• Portable hand warmers

• Flavoring food

• Cleaning drains

What is the purpose of the mirror in the sound wave and laser experiment?

• To absorb the laser light

• To reflect the laser light

• To refract the laser light

• To scatter the laser light

What does the balloon act like in the sound wave experiment?

• A diffraction grating

• A mirror

• A drum membrane

• A laser pointer

What is created when a laser is shone on a diffraction grating?

• A rainbow of colors

• A continuous line

• A single bright spot

• Multiple dots