[SOLVED] A dancer is applying make-up using a concave mirror. The dancer's face is 35 cm in front of the mirror, and the image is 72 cm behind the mirror. Use the mirror equation to calculate the focal length of the mirror.

Answer:Explanation:u = -35v = +72(behind the mirror)1/f = (1/u)+(1/v)1/f = (1/72)- (1/35)1/f = {(35-72)}/25201/f = -37/25201/f = -1/68.11 f = -68.11cm .

A dancer is applying make-up using a concave mirror. The dancer's face is 35 cm in
front of the mirror, and the image is 72 cm behind the mirror. Use the mirror
equation to calculate the focal length of the mirror.

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