If a light source is placed at the focus of a concave \( \mathrm{P}...

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If a light source is placed at the focus of a concave
\( \mathrm{P} \)
mirror, the reflected wave front obtained will be:
W
Concave mirror
(1) Spherical wavefront
(2) Plane wavefront
(3) Elliptical wavefront
(4) None of the above
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