The total (total eclipse ) or partial (partial eclipse ) obscuring of light from a celestial body as it passes behind or through the shadow of another body. A lunar eclipse occurs when the sun, earth, and moon are in a straight line and the shadow of the earth falls on the moon. A solar eclipse occurs when the shadow of the moon falls on the earth. See illustrations.
Solar and lunar eclipses
Moon's shadow in solar eclipse
- Faraday, Michael
- fast neutron
- fast reactor
- fatigue
- feedback
- FEM
- femto-
- Fermat's principle
- fermi
- Fermi constant
- Fermi level
- Fermi pressure
- Fermi, Enrico
- Fermi-Dirac statistics
- fermion
- fermium
- ferrimagnetism
- ferrite
- ferroalloys
- ferroelectric materials
- ferromagnetism
- fertile material
- FET
- Feynman diagram
- fibre optics