Question: A spotlight with a parabolic reflector is 15.0 cm wide and is 6.50 cm deep. See Fig. 21.56 and Example 4. Where should the filament

A spotlight with a parabolic reflector is 15.0 cm wide and is 6.50 cm deep. See Fig. 21.56 and Example 4. Where should the filament of the bulb be located so as to produce a beam of light?

Fig. 21.56 6.50 cm Filament 15.0 cm

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