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yea cus there was a question similar to this, and some people did what the 1.2 years solution did, while others just plugged it into the formula.as quoted from some guy on the conquerhsc discord:
- Recognise the distance travelled by the astronaut is 8 ly (0.8*10).
- Recognise that light from Earth will therefore take 8 years to travel the distance to astronaut.
- Therefore the light that he will see, will be the light from when he had been travelling for 2 years.
- Use time dilation on the 2 years and you will get 1.2 years. (Or could use length contraction on the 8 ly = 4.8 ly, therefore time elapsed = 6-4.8 = 1.2).
this question caused a ton of controversy over there lmao and people ended up agreeing that the correct answer should actually be 3.33 years (see below)
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