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| fermtometer | 2.59020683712 × 1028 fm | 5.18041367424 × 1028 fm | 7.77062051136 × 1028 fm | 1.036082734848 × 1029 fm | 1.29510341856 × 1029 fm | 1.554124102272 × 1029 fm | 1.813144785984 × 1029 fm | 2.072165469696 × 1029 fm | 2.331186153408 × 1029 fm | 2.59020683712 × 1029 fm | 2.849227520832 × 1029 fm | 3.108248204544 × 1029 fm | 3.367268888256 × 1029 fm | 3.626289571968 × 1029 fm | 3.88531025568 × 1029 fm | 4.144330939392 × 1029 fm | 4.403351623104 × 1029 fm | 4.662372306816 × 1029 fm | 4.921392990528 × 1029 fm | 5.18041367424 × 1029 fm | 5.439434357952 × 1029 fm | 5.698455041664 × 1029 fm | 5.957475725376 × 1029 fm | 6.216496409088 × 1029 fm | 6.4755170928 × 1029 fm | 6.734537776512 × 1029 fm | 6.993558460224 × 1029 fm | 7.252579143936 × 1029 fm | 7.511599827648 × 1029 fm | 7.77062051136 × 1029 fm | 8.029641195072 × 1029 fm | 8.288661878784 × 1029 fm | 8.547682562496 × 1029 fm | 8.806703246208 × 1029 fm | 9.06572392992 × 1029 fm | 9.324744613632 × 1029 fm | 9.583765297344 × 1029 fm | 9.842785981056 × 1029 fm | 1.0101806664768 × 1030 fm | 1.036082734848 × 1030 fm | 1.0619848032192 × 1030 fm | 1.0878868715904 × 1030 fm | 1.1137889399616 × 1030 fm | 1.1396910083328 × 1030 fm | 1.165593076704 × 1030 fm | 1.1914951450752 × 1030 fm | 1.2173972134464 × 1030 fm | 1.2432992818176 × 1030 fm | 1.2692013501888 × 1030 fm | 1.29510341856 × 1030 fm | 1.3210054869312 × 1030 fm | 1.3469075553024 × 1030 fm | 1.3728096236736 × 1030 fm | 1.3987116920448 × 1030 fm | 1.424613760416 × 1030 fm | 1.4505158287872 × 1030 fm | 1.4764178971584 × 1030 fm | 1.5023199655296 × 1030 fm | 1.5282220339008 × 1030 fm | 1.554124102272 × 1030 fm | 1.5800261706432 × 1030 fm | 1.6059282390144 × 1030 fm | 1.6318303073856 × 1030 fm | 1.6577323757568 × 1030 fm | 1.683634444128 × 1030 fm | 1.7095365124992 × 1030 fm | 1.7354385808704 × 1030 fm | 1.7613406492416 × 1030 fm | 1.7872427176128 × 1030 fm | 1.813144785984 × 1030 fm | 1.8390468543552 × 1030 fm | 1.8649489227264 × 1030 fm | 1.8908509910976 × 1030 fm | 1.9167530594688 × 1030 fm | 1.94265512784 × 1030 fm | 1.9685571962112 × 1030 fm | 1.9944592645824 × 1030 fm | 2.0203613329536 × 1030 fm | 2.0462634013248 × 1030 fm | 2.072165469696 × 1030 fm | 2.0980675380672 × 1030 fm | 2.1239696064384 × 1030 fm | 2.1498716748096 × 1030 fm | 2.1757737431808 × 1030 fm | 2.201675811552 × 1030 fm | 2.2275778799232 × 1030 fm | 2.2534799482944 × 1030 fm | 2.2793820166656 × 1030 fm | 2.3052840850368 × 1030 fm | 2.331186153408 × 1030 fm | 2.3570882217792 × 1030 fm | 2.3829902901504 × 1030 fm | 2.4088923585216 × 1030 fm | 2.4347944268928 × 1030 fm | 2.460696495264 × 1030 fm | 2.4865985636352 × 1030 fm | 2.5125006320064 × 1030 fm | 2.5384027003776 × 1030 fm | 2.5643047687488 × 1030 fm | 2.59020683712 × 1030 fm |
The light-day is a unit of length useful in astronomy, telecommunications and relativistic physics. It is defined as the distance that light travels in free space in oneday, and is equal to exactly 2.59020683712×1013 metres.
| 1 light-days ≡ 2.59020683712E+28 fermtometers | 4 light-days ≡ 1.036082734848E+29 fermtometers |
| 1.5 light-days ≡ 3.88531025568E+28 fermtometers | 4.5 light-days ≡ 1.165593076704E+29 fermtometers |
| 2 light-days ≡ 5.18041367424E+28 fermtometers | 5 light-days ≡ 1.29510341856E+29 fermtometers |
| 2.5 light-days ≡ 6.4755170928E+28 fermtometers | 5.5 light-days ≡ 1.424613760416E+29 fermtometers |
| 3 light-days ≡ 7.77062051136E+28 fermtometers | 6 light-days ≡ 1.554124102272E+29 fermtometers |
The femtometre (American spelling femtometer, symbol fm derived from the Danish and Norwegian word femten, "fifteen"+Ancient Greek: μέτρον, metrοn, "unit of measurement") is an SI unit of length equal to 10−15 metres, which means a quadrillionth of one. This distance can also be called a fermi and was so named in honour of physicist Enrico Fermi, as it is a typical length-scale of nuclear physics.
| 1 fermtometers ≡ 3.8606955462749E-29 light-days | 4 fermtometers ≡ 1.54427821851E-28 light-days |
| 1.5 fermtometers ≡ 5.7910433194124E-29 light-days | 4.5 fermtometers ≡ 1.7373129958237E-28 light-days |
| 2 fermtometers ≡ 7.7213910925498E-29 light-days | 5 fermtometers ≡ 1.9303477731375E-28 light-days |
| 2.5 fermtometers ≡ 9.6517388656873E-29 light-days | 5.5 fermtometers ≡ 2.1233825504512E-28 light-days |
| 3 fermtometers ≡ 1.1582086638825E-28 light-days | 6 fermtometers ≡ 2.3164173277649E-28 light-days |
| 1 light-days ≡ 2.59020683712 × 1028 fermtometers |
| 1 fermtometers ≡ 3.8606955462749 × 10-29 light-days |