How much is 48 hours calculated at the speed of light?

Answer 1

When traveling at the speed of light it would appear to you that time (the 24 hours) were passing normally, however it would also appear that the rest of the universe had speeded up.

To an observer watching you it would appear that your clock had stopped.

To understand why look in the related link below.

Answer 2

It's really hard to talk about something that's moving ATthe speed of light.

So let's just talk about something that's moving at only 99.9999% of it ...

that's actually done every day in particle accelerators.

OK. You and a bunch of other people are standing around in a big field on a nice

day, looking at each other, listening to the birds, and generally getting bored.

Finally, in order to liven things up, you take off and fly away from the crowd, at

99.9999% of the speed of light. They watch you, in amazement, and you look

back at them, just to see the startled expression on everyone's face. Immediately,

you and everybody else notice something really strange going on:

-- You feel completely normal, and your pulse is beating around 65 beats for

each minute on your wristwatch. But anybody standing in the field and watching

you sees that according to his wristwatch, your heart and your wristwatch are

running so slowly that they've both almost stopped.

-- Everybody standing in the field feels completely normal, and everybody's pulse

is beating around 65 beats for each minute on his wristwatch. But as you watch

them, you see that according to your wristwatch, the heart and the wristwatch of

every person in the crowd are running so slowly that all of them have almost

stopped.