Brown Dwarf Trivia Questions

What is a brown dwarf?

• A brown planet

• A type of black hole

• A failed star that cannot sustain hydrogen fusion

• A main-sequence star

What distinguishes a brown dwarf from a planet or a star?

• Its mass is 10-80 times that of Jupiter but not enough to sustain hydrogen fusion

• It is smaller than Jupiter but larger than Earth

• It emits visible light like a star

• It has a surface temperature over 5,000 Kelvin

True or False: Brown dwarfs emit light using infrared wavelengths

• True
• False

What is the typical surface temperature range for brown dwarfs?

• 3,000–6,000 Kelvin

• 300–2,500 Kelvin

• 10,000–15,000 Kelvin

• Below 300 Kelvin

Why do brown dwarfs emit mostly infrared radiation instead of visible light?

• They are composed of heavy elements

• Their temperatures are too low to emit significant visible light

• They have a strong magnetic field

• They rotate too quickly

Which two elements primarily compose brown dwarfs?

• a) Hydrogen and helium

• b) Carbon and oxygen

• c) Iron and nickel

• d) Lithium and magnesium

On the Hertzsprung-Russell diagram, where are brown dwarfs located?

• Within the main sequence

• In the upper-right region

• Below the main sequence in the "substellar domain"

• Near the white dwarf region

How can brown dwarfs influence their surroundings?

• a) By triggering supernovas

• b) By emitting faint light and infrared radiation

• c) By generating strong magnetic fields

• d) By consuming nearby planets

What technique is commonly used to analyze the chemical composition and temperature of brown dwarfs?

• X-ray imaging

• Infrared spectroscopy

• Microwaves

• Ultraviolet observation

Which spectral class of brown dwarfs is dominated by methane absorption?

• a) L class

• b) T class

• c) Y class

• d) M class