What Color Was the Big Bang?

The video explores the concept of color in the context of the Big Bang, starting with the emergence of photons and the challenges in determining the first color. It discusses the relationship between temperature and color, based on Planck's law, and the nuances of human vision. Despite the theoretical calculations, the video concludes that the universe was opaque at the time of the Big Bang, making it impossible to see any color. The video reflects on the beauty of the universe's colors over time.

What is the first step in perceiving color according to the video?

• The presence of sound waves

• The presence of gravitational waves

• The presence of photons

• The presence of chemical reactions

According to Planck's law, what determines the color of a black body?

• Its size

• Its age

• Its temperature

• Its chemical composition

What is a black body as described in the video?

• An object that emits and absorbs its own light

• An object that only absorbs light

• An object that only emits light

• An object that reflects all light

Which color does the Sun emit the most according to the video?

• Red

• Blue

• Yellow

• Green

Why might the Big Bang appear more blue to humans than it actually was?

• Blue light is more intense

• Blue light travels faster

• Humans are better at seeing blue than violet

• The Big Bang emitted more blue light

What was the universe's state shortly after the Big Bang, making it impossible to see anything?

• Transparent

• Opaque

• Reflective

• Translucent

By the time the universe became visible, what temperature had it cooled down to?

• 1,000 Kelvin

• 3,000 Kelvin

• 5,000 Kelvin

• 10,000 Kelvin