Question

3.32 A 30-V incandescent flashlight balb draws 0.23 A, converting about 1.0% of the dissipated power into light (A 550 nm). If the beam has a cross-sectional area of 10cm2 and is spproximately cylindrical (a) How many photons are emitted per second? (b) How many photons occupy each meter of the beam? () What is the flux density of dhe beam as it leaves the flashlight?

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