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3 years ago

An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is

Chemistry

1 answer:

Nimfa-mama [501]3 years ago

3 0

The focal length of the mirror is 15 cm

From the question given above, the following data were obtained:

Object distance (u) = 30 cm

Image distance (v) = 30 cm

<h3>Focal length (f) =? </h3>

The focal length of the mirror can be obtained as follow:

$\frac{1}{f} = \frac{1}{v} + \frac{1}{u} \\\\\frac{1}{f} = \frac{1}{30} + \frac{1}{30}\\\\\frac{1}{f} = \frac{2}{30} \\\\\frac{1}{f} = \frac{1}{15} \\\\$

<h3>Invert </h3><h3>f = 15 cm</h3>

Therefore, the focal length of the mirror is 15 cm

Learn more: brainly.com/question/1392083

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<u>Answer:</u> The number of moles of HI in the solution is $1.24\times 10{-3}$ moles.

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$NH_4I(s)\rightleftharpoons NH_3(g)+HI(g)$

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An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is​

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