A candle is placed 9 cm in front of a concave mirror with a focal length of 6 cm. How far from the mirror will the image be located?What is

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A candle is placed 9 cm in front of a concave mirror with a focal length of 6 cm. How far from the mirror will the image be located?What is the magnification of this image?
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Ladonna 3 years 2021-07-23T01:05:44+00:00 1 Answers 175 views 0

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  1. RobertKer
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    2021-07-23T01:06:51+00:00
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    Answer:

    Explanation:

    Given that,

    An object is place 9cm in from of a concave mirror

    Then, object distance is 9cm

    u = 9cm

    Focal length of the mirror is 6cm

    Then, f = 6cm

    A. We want to find image distance

    Image distance v?

    From mirror formula

    1 / f = 1 / u + 1 / v

    Where

    f is focal length

    u is object distance

    v is image distance

    1 / f = 1 / u + 1 / v

    1 / 6 = 1 / 9 + 1 / v

    1 / v = 1 / 6 – 1 / 9

    1 / v = 1 / 18

    Take reciprocal of both sides

    v = 18 cm

    Since the image distance is positive, then, the image is real.

    B. Magnification M?

    Magnification can be determined using

    M = image distance / object distance

    M = v / u

    M = 18 / 9

    M = 2

    So, the image is double.

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