Explanation

• A hydrogen bomb works on the principle of nuclear fusion.
• In this process, light atoms (like hydrogen isotopes) combine.
• This fusion releases extremely large energy.
• It is more powerful than an atomic bomb (which uses fission).
• Therefore, it involves complete fusion of atoms.

Last verified on 30-04-2026

Explanation

Explanation

• The law of universal gravitation was proposed by Isaac Newton.
• He introduced it in 1687 in his famous book Principia.
• It explains that every object attracts every other object.
• The force depends on mass and distance.

Last verified on 27-04-2026

Explanation

• Mars is known as the Red Planet
• Because its surface is covered in iron oxide (rust) and has an orange-red appearance
• Fourth planet from the Sun
• Symbol ♂
• The largest volcano is Olympus Mons.
• Two moons: Deimos and Phobos.

Question updated on 08 march 2026

Explanation

• Ibn al-Haytham is known as the Father of Modern Optics.
• He made groundbreaking discoveries about light and vision.
• His famous book is Kitab al-Manazir (Book of Optics).
• His research was done around 1011–1021 AD.

Last verified on 27-04-2026