A certain Helium-Neon Laser emitting at 633 nm has a line width of 0.002 nm. The coherence length of the laser is given by:

A certain Helium-Neon Laser emitting at 633 nm has a line width of 0.0

1.	A certain Helium-Neon Laser emitting at 633 nm has a line width of 0.002 nm. The coherence length of the laser is given by:
A.	40 cm
B.	5 cm
C.	20 cm
D.	10 cm
Answer» D. 10 cm

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A certain Helium-Neon Laser emitting at 633 nm has a line width of 0.002 nm. The coherence length of the laser is given by:

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