The conclusion of the Michelson–Morley experiment was:

a null result; they did not detect the aether.

Which of the following statements is true?

Events could be simultaneous in one FoR and not simultaneous in another FoR

The laws of physics will appear not to be the same to observers in non-inertial frames of reference, such as:

an aeroplane decelerating after landing., a car turning a corner., a rotating merry-go-round.

Which one of the following statements about light is false?

Visible light is distinct from other parts of the electromagnetic spectrum.

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Physics of Light and Relativity

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Test your knowledge on light properties and the principles of relativity with these engaging questions.

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Questions 10

Answers

1
An electron moves at 0.6c. What is its relativistic momentum?
1.23 x 10-22 kg s-1
2.05 x 10-22 kg s-1
2.73 x 10-22 kg s-1
1.64 x 10-22 kg s-1
2
A rocket has a length of 100 m when on Earth. How long will it appear to an observer on Earth when it travels at 0.95c?
320 m
31.2 m
22.4 m
100 m
3
The conclusion of the Michelson–Morley experiment was:
a null result; they did not detect the aether.
the aether exists and is a very fine medium filling up the whole universe.
the aether does not exist as the speed of light was found to be different.
the aether exists because the speed of light was found to be a constant.
4
On 1 Jan 2020, Grant departs Earth at 0.95c . What year will it be on Earth after he has travelled one year in his FoR?
2021
2024
2023
2022
5
The purpose of the Michelson–Morley experiment was:
to detect the aether.
to measure the speed of the aether.
to show that the speed of light is constant.
to measure the speed of Earth around the Sun.
6
Which of the following statements is true?
If event A occurs before event B in a FoR, it must be before B in every FoR
Events could be simultaneous in one FoR and not simultaneous in another FoR
There is no true simultaneity.
Events that are simultaneous in one FoR will be simultaneous in every FoR
7
The Sun has an energy output of 3.85 x 10²⁸ W. By how much does the Sun's mass decrease each minute?
1.28 x 1020 kg
2.57 x 1013 kg
7.70 x 1021 kg
4.28 x 1011 kg
8
A star is 5.963 light years from Earth. If a rocket travels there at 0.15c calculate the time from the astronaut's FoR.
38.8 years
39.8 years
39.7 years
39.3 years
9
The laws of physics will appear not to be the same to observers in non-inertial frames of reference, such as:
an aeroplane decelerating after landing.
a car turning a corner.
a passanger on a train moving at a constant velocity.
a rotating merry-go-round.
10
Which one of the following statements about light is false?
Visible light is distinct from other parts of the electromagnetic spectrum.
Light carries energy which can be exchanged with bodies.
Light has momentum; it can hit bodies and set them in motion.
Light travels faster in a vacuum than any material body.

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