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Charlie Lem Charlie Lem
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3 years ago
How do we know that pulsars must be very small in size (radius)?
      
a. Only very small objects can beam radiation into space.
      
b. Some spin so rapidly that if they were larger in size, their surfaces would be moving faster than the speed of light.
      
c. We have measured their radii directly in high-resolution telescope images.
      
d. This is only a theory that has not yet been confirmed by observations.
      
e. Their small sizes are inferred from careful study of their spectra.
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Educator
3 years ago
Quote from: Charlie Lem (3 years ago)
b. Some spin so rapidly that if they were larger in size, their surfaces would be moving faster than the speed of light.
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