Answer:
If you were traveling in a spaceship at a velocity close to the speed of light, you would notice several effects of special relativity, including:
Time dilation: Time would appear to be passing more slowly for you compared to someone who is not moving at such a high velocity. This means that while only a few minutes may have passed for you on the spaceship, much more time may have passed for someone on Earth.
Length contraction: Objects in the direction of your motion would appear to be shorter than they actually are. This means that objects that are normally a certain length may appear shorter to you on the spaceship.
Relativistic Doppler effect: Light emitted by objects in the direction of your motion would appear to be shifted towards the blue end of the spectrum, while light emitted by objects behind you would appear shifted towards the red end of the spectrum. This is known as the relativistic Doppler effect.
Increased mass: As you approach the speed of light, your mass would appear to increase. This means that it would take more and more energy to continue accelerating the spaceship.
These effects are all consequences of the special theory of relativity and have been experimentally verified.
Step-by-step explanation: