What Direct Evidence Do We Have That the Weak and Electromagnetic

question 23

Multiple Choice

What direct evidence do we have that the weak and electromagnetic forces were once unified as a single force?

• A) The most advanced telescopes are able to see back to the GUT era in the universe.
• B) Detectors on Earth have received photons and high-energy particles from the GUT era.
• C) Temperatures in the center of the Sun can reproduce the conditions during the Electroweak era.
• D) Particle accelerators on Earth can reach energies equivalent to the high temperatures of the Electroweak era and have produced particles predicted by the unified theory.
• E) We have no direct evidence of such a unified force.

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