Physics trivia

8 physics trivia questions, from easy to hard. Tap a question to see the answer. They're real questions from Rubicon, where you type the answer yourself and an AI judge reads what you meant.

This set covers Heat, Energy & Thermodynamics, Lasers & Holograms, Optics, Light & Color, Quantum & the Very Small, Rotational Motion & Spin and Sound & Waves.

Questions and answers

  1. Easy Why does a laser pointer shine in one pure color instead of white?

    Laser light consists of a single specific wavelength, while white light mixes all colors of the rainbow together.

  2. Easy Which list correctly ranks these three particles from largest to smallest?

    An atom is larger than a proton, which in turn is larger than a quark.

  3. Easy Why must spacewalking astronauts speak to each other using radios instead of through the air?

    Sound requires a medium like air to transmit vibrations, but the vacuum of space lacks the particles needed to carry voices directly.

  4. Medium To the nearest whole number, what temperature in degrees Celsius represents absolute zero?

    Absolute zero is approximately minus two hundred seventy-three degrees Celsius, where particles reach their minimum motion.

  5. Medium Which pocket device uses internal sensors to detect its physical orientation and adjust the screen display?

    A smartphone detects its physical orientation using internal accelerometers and gyroscopes to adjust the screen display.

  6. Medium Why does dry beach sand become scorching hot at midday while adjacent ocean water stays cool?

    Water requires vastly more energy to raise its temperature than sand, meaning sand heats up much faster under identical sunlight.

  7. Hard Which primary monochromatic defect causes off-axis point sources to blur into an asymmetrical flare resembling a comet's tail?

    Coma causes off-axis light rays to focus at different magnifications, creating a comet-like tail.

  8. Hard Why do two objects with different spectral reflectance curves sometimes appear to be the same color under a specific light source?

    They reflect different wavelength mixtures that happen to trigger human eye receptors identically only under that specific light source.

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