A laser beam is of 9 mW, diameter = 2 mm. Then what is the amplitude of magnetic field associated with it ?
A. 49 µT
B. 98 µT
C. 9.8 µT
D. 4.9 µT
Answer:D
A laser beam is of 9 mW, diameter = 2 mm. Then what is the amplitude of magnetic field associated with it ?
A. 49 µT B. 98 µT C. 9.8 µT D. 4.9 µT