Q1) a) Calculate the peak amplitude E0 of the electric field associated with light waves from a 100 Watt light bulb at a distance of 2 metres. b) A 100 milliWatt Helium-Neon laser emits light of wavelength 633 nm, with a beam radius of 1 mm. Calculate the peak amplitude E0 of the electric field at a distance of 2 metres from the laser. c) The laser beam in (b) above is focused by a lens to a spot size of 2 micrometer radius. Calculate the peak amplitude of the electric field in the spot.
Q1) a) Calculate the peak amplitude E0 of the electric field associated with light waves from a 100 Watt light bulb at a distance of 2 metres. b) A 100 milliWatt Helium-Neon laser emits light of wavelength 633 nm, with a beam radius of 1 mm. Calculate the peak amplitude E0 of the electric field at a distance of 2 metres from the laser. c) The laser beam in (b) above is focused by a lens to a spot size of 2 micrometer radius. Calculate the peak amplitude of the electric field in the spot.
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Q1)
a) Calculate the peak amplitude E0 of the electric field associated with light waves from a 100
Watt light bulb at a distance of 2 metres.
b) A 100 milliWatt Helium-Neon laser emits light of wavelength 633 nm, with a beam radius of
1 mm. Calculate the peak amplitude E0 of the electric field at a distance of 2 metres from the
laser.
c) The laser beam in (b) above is focused by a lens to a spot size of 2 micrometer radius. Calculate
the peak amplitude of the electric field in the spot.
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