The hydrogen bomb and Uranium bomb are based respectively on Nuclear fusion and fission.

Nuclear weapons are some of the most powerful and destructive weapons ever created. They are generally categorized into two types: fission bombs and fusion bombs. The hydrogen bomb, also known as a thermonuclear bomb or H-bomb, is based on nuclear fusion. On the other hand, the uranium bomb, also known as an atomic bomb or A-bomb, is based on nuclear fission.

Nuclear Fusion:
Nuclear fusion is a process in which two or more atomic nuclei come together to form a heavier nucleus, releasing a large amount of energy in the process. This is the same process that powers the sun and other stars. In the case of the hydrogen bomb, nuclear fusion occurs when isotopes of hydrogen, such as deuterium and tritium, combine to form helium. This fusion reaction releases an enormous amount of energy, many times greater than that released by nuclear fission.

Nuclear Fission:
Nuclear fission, on the other hand, is the process in which a heavy atomic nucleus splits into two or more smaller nuclei, releasing a significant amount of energy. Fission reactions are typically triggered by bombarding the nucleus with a neutron. This process is used in atomic bombs like the uranium bomb. In these bombs, a subcritical mass of fissile material, such as highly enriched uranium or plutonium, is brought together to form a supercritical mass. This causes a chain reaction where each split nucleus releases more neutrons, leading to a rapid and uncontrolled release of energy.

Difference between the Hydrogen Bomb and Uranium Bomb:
1. Energy Release: The energy released in a hydrogen bomb is much greater than that in an uranium bomb. The fusion reaction in a hydrogen bomb releases several orders of magnitude more energy than the fission reaction in an uranium bomb.
2. Complexity: The hydrogen bomb is much more complex and difficult to build compared to the uranium bomb. It requires a fission bomb as a trigger to initiate the fusion reaction.
3. Fuel: The hydrogen bomb uses isotopes of hydrogen, such as deuterium and tritium, as fuel for the fusion reaction, while the uranium bomb uses fissile materials like uranium-235 or plutonium-239 for the fission reaction.

Conclusion:
In summary, the hydrogen bomb is based on nuclear fusion, where isotopes of hydrogen combine to form helium, releasing a massive amount of energy. On the other hand, the uranium bomb is based on nuclear fission, where a heavy atomic nucleus splits into smaller nuclei, releasing a significant amount of energy.