In the two-slit experiment, for the condition of bright fringes, the value of m = +2 corresponds to a path difference of ?
Indicate whether the statement is true or false
FALSE
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Some massive stars only live a few million years
a. True b. False Indicate whether the statement is true or false
Why can't current theories describe what happened during the Planck era?
A) We do not know how hot or dense the universe was during that time. B) We do not understand the properties of antimatter. C) We do not yet have a theory that links quantum mechanics and general relativity. D) The Planck era was the time before the Big Bang, and we cannot describe what happened before that instant.
A year is defined as:
A) the time it takes for Earth to complete a rotation on its axis. B) the time it takes for the Moon to complete an orbit of Earth. C) the time it takes for the Moon to complete a phase cycle. D) the time it takes for Earth to complete an orbit around the Sun. E) the time it takes for the Sun to complete an orbit around Earth.
The most massive stars generate energy at the end of their lives by fusing iron in their cores
Indicate whether the statement is true or false