please tell me

Asked by ketagajjar | 4th Dec, 2009, 12:52: PM

Expert Answer:

The torch light is polychromatic i.e. consists of many different wavelengths and is not coherent i.e. they have phase differences.

Again the bulb in the torch emits this light in all directions and the parabolic reflectors focuses them into the circular illumination that one observes.




Answered by  | 4th Dec, 2009, 03:21: PM

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