(i) Find the energy stored in a 90 cm le...

(i) Find the energy stored in a 90 cm length of a laser beam operating at `6 mW`.
(ii) Find the amplitude opf electric field in a parallel beam of light of intensity `17.7 W//m^(2)`.

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(i) Find the energy stored in a 90 cm length of a laser beam operating at `6 mW`. (ii) Find the amplitude opf electric field in a parallel beam of light of intensity `17.7 W//m^(2)`.

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(i) Find the energy stored in a 90 cm length of a laser beam operating at `6 mW`.
(ii) Find the amplitude opf electric field in a parallel beam of light of intensity `17.7 W//m^(2)`.