Theoretically if I was 66 million light years away from earth and had a telescope strong enough would I be able to see the dinosaurs if I faced it towards earth and nothing was obstructing my view?
In: Physics
No. Lenses have a limit of resolution based on the size of the wavelength of the electromagnetic spectrum they are observing. That’s why light microscopes can’t see individual atoms but electron microscopes can (big atoms, anyway). The same problem comes into play with telescopes. At 66 million light years distance, there is a limit of resolution that is never going to see dinosaurs on Earth because the angle is too small for the wavelengths of light to resolve that image.
You might get around that using a large array telescope. But the array would need to be ridiculously huge.
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