The length of a meter rod moving with a velocity equal to 3×10^8 m/s appears to an observer at rest as

Explanation

According to the theory of special relativity, objects in motion appear contracted in the direction of motion to an observer at rest. This contraction is known as length contraction. As the velocity approaches the speed of light, the length contraction becomes significant. Therefore, the length of the meter rod appears contracted to zero from the perspective of an observer at rest.Incorrect Options and Explanations: (a) 1 m - This is not the correct length contraction observed at relativistic velocities. (b) 1/2 m - This option does not account for the significant length contraction observed at relativistic velocities. (c) 1/4 m - This option does not account for the significant length contraction observed at relativistic velocities.(21) In a certain circuit, a collector current of 10 mA and a base current of 40 µA. What is the current gain of the transistor?