MDCAT Physics MCQ #315

Why do spectral lines shift to longer wavelengths in high-temperature stars?

MDCAT Physics MCQ #315

  1. Question 1

    Q1. Why do spectral lines shift to longer wavelengths in high-temperature stars?

    • A) Thermal expansion reduces photon energy.
    • B) Electrons prefer higher energy levels at elevated temperatures.
    • C) Doppler shifts from random thermal motion.
    • D) Energy levels broaden with temperature increases.

    Answer: Doppler shifts from random thermal motion.

    Explanation: Thermal motion causes random Doppler shifts. Option A confuses thermal expansion with Doppler effects.