The video tutorial explores the concept of light, describing it as a form of energy made of photons. It explains how light behaves as both a particle and a wave, interacting differently with various materials. The tutorial categorizes objects based on their interaction with light: transparent, opaque, and translucent. It highlights the speed of light, especially in a vacuum, and introduces the concept of refraction, using a pencil in water as an example. The video concludes with trivia about human bioluminescence and the speed of light reaching the Moon.

What is the smallest unit of visible light?

• Proton

• Neutron

• Photon

• Electron

How does light behave?

• Neither as a particle nor a wave

• Both as a particle and a wave

• Only as a wave

• Only as a particle

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

What type of object allows light to pass through completely?

• Opaque

• Reflective

• Transparent

• Translucent

Tags

NGSS.MS-PS4-2

Which of the following is an example of an opaque object?

• Wood

• Glass of water

• Butter paper

• Frosted glass

What is the speed of light in a vacuum?

• 1 million miles per second

• 0.1 million miles per second

• 1 million kilometers per second

• 0.1 million kilometers per second

Tags

NGSS.MS-PS4-1

How long does it take for light to travel from the Sun to the Earth?

• 8 days

• 8 hours

• 8 minutes

• 8 seconds

What is the term for the bending of light as it passes through different mediums?

• Reflection

• Dispersion

• Refraction

• Diffraction

Tags

NGSS.MS-PS4-2

What happens to a pencil when placed in a beaker of water?

• It appears bent due to refraction

• It bends

• It breaks

• It appears straight

Tags

NGSS.MS-PS4-2

What does it mean if an object is bioluminescent?

• It emits light

• It absorbs light

• It refracts light

• It reflects light

How long does it take for light to travel from the Earth to the Moon?

• 12 minutes

• 1.2 seconds

• 12 seconds

• 1.2 minutes