Can you look back in time with a mirror?

Yes, we always look into the past, when looking somewhere. There is for instance a mirror on the moon. When sending a laser beam to that mirror, we can detect the reflected light about 2.5 seconds later. This could be interpreted as looking 2.5 seconds into the past, when the laser has been fired.

Can you see into the past from space?

The past no longer exists, so no one can directly look at it. Instead, the telescopes are looking at the present-time pattern of a beam of light. Since the beam of light has been traveling through the mostly-empty vacuum of space for millions of years, it has been largely undisturbed.

What should you do with the mirror to be able to catch light?

Placing a mirror in the correct place in a room allows you to optimise natural light. To do so, place the mirror adjacent to a window to perfectly catch the angle of light and bounce it throughout the room.

Can mirrors cool the Earth?

If you had enough mirrors, you could reflect enough of the Sun’s light to reduce the Earth’s temperature. These mirrors would help to balance out the warming effect of greenhouse gases.

Can we see past in a mirror?

You always look into the past. If you look into mirror, you see yourself as you looked moment before. Specifically this is how long before, in seconds where d is the distance to mirror in meters: If such mirror faced earth and was far enough, we would be able to see past indeed. Actually there’s a tiny mirror facing Earth on Moon.

Is it possible to see two years into Earths past?

What if we put a mirror in space, 1 light year from earth and we pointed Hubble at it would it be possible to see two years into earths past? If you look at a mirror in your bathroom, one meter away, it takes about 7×10 -9 s for light to make the round trip, so technically you’re seeing 7×10 -9 s into your past.

What would happen if a telescope is not large enough?

If the telescope isn’t large enough, the resolutionwould be low, and the observer wouldn’t be able to make out things far away. To get an idea, the size (diameter of mirror for instance) of the telescope that’ll enable you to see an object of about 10m at that distance is about $10^{8}$km while the diameter of earth is about 12800 km. But again]

Is there a mirror in the universe?

In fact, something like such a mirror do exist in the universe. Dust arround progenitor of SN 1572 still reflects light od the outburst. Spectral analysis of the light confirm that the supernova was of Ia type (the fact established long before from light curve of the supernova).