What is a direct consequence of Einstein's Special Theory of Relativity?
Show answer & explanation
Correct answer: C
Explanation
Solution: The correct answer is The speed of light is constant in all inertial frames, leading to time dilation and length contraction.
Explanation:
☛ Albert Einstein published the Special Theory of Relativity in the year 1905.
☛ This theory is fundamentally based on two postulates: the laws of physics are identical in all inertial frames of reference, and the speed of light in a vacuum () is constant for all observers, regardless of their relative motion or the motion of the light source.
☛ A direct consequence of this constancy of the speed of light is that space and time are not absolute; instead, they are relative.
☛ As an object approaches the speed of light, an outside observer perceives its clock ticking slower (time dilation) and its dimension along the direction of motion becoming shorter (length contraction).
☛ Another major result of this theory is the mass-energy equivalence, formulated by the famous equation , proving that mass and energy are interchangeable.
Extra Exam-Relevant Facts:
☛ General Theory of Relativity: Proposed by Albert Einstein in 1915, it explains gravity as the curvature of spacetime caused by mass and energy, rather than a conventional Newtonian force.
☛ Photoelectric Effect: Albert Einstein was awarded the Nobel Prize in Physics in 1921 specifically for his explanation of the photoelectric effect, not for the theory of relativity.
☛ Speed of Light: In a vacuum, the speed of light is approximately (), which represents the ultimate speed limit of the universe.
☛ Spacetime: The Special Theory of Relativity unified three-dimensional space and one-dimensional time into a continuous four-dimensional continuum known as spacetime.
Important One-Liners for Upcoming Exams:
☛ In which year did Albert Einstein publish the Special Theory of Relativity? → 1905
☛ Which formula represents mass-energy equivalence? →
☛ For which discovery did Albert Einstein receive the 1921 Nobel Prize in Physics? → Photoelectric Effect
☛ What phenomenon describes a moving clock ticking slower relative to a stationary observer? → Time Dilation
☛ What is the value of the speed of light in a vacuum? → Approximately