Introduction of Physics

UNIT

           CGS, MKS, FPS, SI.

Length-

light year = Distance travelled by light in                     1 year in vacuum.

1 ly = 9.46 x 10¹⁵m

1 parsec = 3.26 ly = 3.08 x 10¹⁶m

1 nautical mile or sea-mile = 6020ft

1 angstrom = 10^-10m

Time-

1 solar day = 86400sec

1yr = 3651/2 solar days

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