The first test of a fission bomb released an amount of energy approximately equal to . The first thermonuclear ("hydrogen") bomb test released energy approximately equal to . Nuclear bombs have had yields between 10 tons TNT (the W54) and 50 megatons for the Tsar Bomba (see TNT equivalent). A thermonuclear weapon weighing as little as can release energy equal to more than (this is nearly the record for the ratio between yield and weapon weight, achieved with the W56).
The first test of a fission bomb released an amount of energy approximately equal to . The first thermonuclear ("hydrogen") bomb test released energy approximately equal to . Nuclear bombs have had yields between 10 tons TNT (the W54) and 50 megatons for the T,sar Bomba (see TNT equivalent). A thermonuclear weapon weighing as little as can release energy equal to more than (this is nearly the record for the ratio between yield and weapon weight achieved with the W56).