The energy that reaches Earth from space can be harmful to humans. One such type of energy, in excess
can even cause cancer. Which type of energy, in excess, can cause cancer in humans?

Hey

Your answer would be harmful radiation from the sun, and also cosmic rays.

When harmful gamma and x rays* from the sun come near your DNA, they sometimes break it. this can cause cancer. This is also caused by Cosmic rays** which come from supper novas or other types of explosions.

*ᵀʰᵉ ˢᵘⁿ ʸᵒᵘ ᵐᵃʸ ⁿᵒᵗ ʰᵃᵛᵉ ᵏⁿᵒʷⁿ ᵖʳᵒᵈᵘᶜᵉˢ ᵃˡˡ ᵗʰᵉ ᶠʳᵉᑫᵘᵉⁿᶜᶦᵉˢ ᵒᶠ ˡᶦᵍʰᵗ, ʷʰᶦᶜʰ ᶦⁿᶜˡᵘᵈᵉˢ ʳᵃᵈᶦᵒ ʷᵃᵛᵉˢ ᵃⁿᵈ ᵍᵃᵐᵐᵃ ʳᵃʸˢ ᵃˢ ʷᵉˡˡ. ᵀʰᵉⁿ ʸᵒᵘ ᵃˢᵏ ᵐᵉ "ʷʰʸ ᶦˢ ᵗʰᵉ ˢᵘⁿ ʸᵉˡˡᵒʷ ᶦᶠ ᶦᵗ ᵖʳᵒᵈᵘᶜᵉˢ ᵃˡˡ ᶠʳᵉᑫᵘᵉⁿᶜᶦᵉˢ ᵒᶠ ˡᶦᵍʰᵗ?" ᵗʰᵉ ʳᵉᵃˢᵒⁿ ʷʰʸ ᶦˢ ᵇᵉᶜᵃᵘˢᵉ ᵐᵒˢᵗ ᵒᶠ ᶦᵗˢ ˡᶦᵍʰᵗ ᶦˢ ʸᵉˡˡᵒʷ ᵇᵘᵗ ˢᵐᵃˡˡ ᶠʳᵃᶜᵗᶦᵒⁿˢ ᵃʳᵉ ᵃˡˡ ᵗʰᵉ ᵒᵗʰᵉʳ ᶠʳᵉᑫᵘᵉⁿᶜᶦᵉˢ.

**ᶜᵒˢᵐᶦᶜ ʳᵃʸˢ ᶜᵒᵐᵉ ᶠʳᵒᵐ ᵐᵃⁿʸ ᵈᶦᶠᶠᵉʳᵉⁿᵗ ᵗʸᵖᵉˢ ᵒᶠ ᵉˣᵖˡᵒˢᶦᵒⁿˢ, ᵗʰᵃᵗ ᶦⁿᶜˡᵘᵈᵉˢ ˢᵘᵖᵉʳⁿᵒᵛᵃˢ ⁽ʷʰᵉⁿ ᵃ ˢᵗᵃʳ ³⁰ ᵗᶦᵐᵉˢ ᵇᶦᵍᵍᵉʳ ᵗʰᵃⁿ ᵗʰᵉ ˢᵘⁿ ᵍᵉᵗˢ ᵒˡᵈ ᶦᵗ ᶜᵒˡˡᵃᵖˢᵉˢ ᵃⁿᵈ ᵗʰᵉⁿ ᵉˣᵖˡᵒᵈᵉˢ ᵈᵘᵉ ᵗᵒ ᵐᵃˢˢᶦᵛᵉ ᵖʳᵉˢˢᵘʳᵉ⁾. ᶜᵒˢᵐᶦᶜ ʳᵃʸˢ ᵃˡˢᵒ ᶜᵒᵐᵉ ᶠʳᵒᵐ ᵗʸᵖᵉ ¹ᴬ ˢᵘᵖᵉʳⁿᵒᵛᵃˢ. ᵃ ᵗʸᵖᵉ ¹ᴬ ˢᵘᵖᵖᵉʳ ⁿᵒᵛᵃ ᵒᶜᵉʳˢ ʷʰᵉⁿ ᵃ ʷʰᶦᵗᵉ ᵈʷᵃʳᶠ ʳᵉᵃᶜʰᵉˢ ᵃᵇᵒᵘᵗ ³ ˢᵒˡᵃʳ ᵐᵃˢˢᵉˢ. ᵗʰᵉ ᵖʳᵉˢˢᵘʳᵉ ʰᵒˡᵈᶦⁿᵍ ᶦᵗ ᵘᵖ ᶠᵃᶦˡˢ ᵈᵘᵉ ᵗᵒ ᵗʰᵉ ᵐᵃˢˢᶦᵛᵉ ᵍʳᵃᵛᶦᵗᵃᵗᶦᵒⁿᵃˡ ˢᵗʳᵉⁿᵍᵗʰ. ᶦᵗ ᵉˣᵖˡᵒᵈᵉˢ ʳᵉˡᵉᵃˢⁿᶦⁿᵍ ᵐᵃⁿʸ ᵈᶦᶠᶠᵉʳᵉⁿᵗ ᶠʳᵉᑫᵘᵉⁿᶜᶦᵉˢ ᵒᶠ ˡᶦᵍʰᵗ ʷʰᶦᶜʰ ᶜᵃⁿ ᵇᵉ ʰᵃʳᵐᶠᵘˡ.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.