why dispersion does not take place through a rectangular glass slab but takes place through a prism?

4 ✅ Answers ? Favorite Answer When light enters the first surface of a rectangular slab there is dispersion because each color is bent (refracted) a different amount. But when the dispersed light leaves the second surface, which is parallel to the first surface, each color is refracted back so the colors recombine to give … Read more

Gravity on a flat earth?

Imagine a flat earth extending to infinity in all directions. How thick would the earth need to be to have the same gravity at the surface as we have now. Assume a density of 5,515 kg/m³ g = 9.81 m/s² Update: ********************** As pointed out by Rohan and Madhukar Daftary, this can be solved relatively … Read more

Physics can be fun… like this?

Please explain why there are no square or triangular stars, and you are invited to make up your own theorum… Serious answers will be ignored… lol Update: Ignore the thumbs down.. they are probably from peole who are being too serious… 10 ✅ Answers ? Favorite Answer this is a good question!! let me think … Read more