A concave mirror has a focal length of 17 cm. the mirror forms an image located 42 cm in front of the mirror. - 1.40 is the magnification of the mirror
A microscope's capacity to generate a picture of an item at a scale that is bigger (or even smaller) than its real size is known as magnification. Only when it is feasible to discern more details of an object in the picture than when examining the object with the unassisted eye can magnification serve a beneficial function.
Given:
A concave mirror has a focal length of = F = 17 cm
This mirror forms an image located = V = 42 cm
(in front of the mirror)
magnification of the mirror= M = ? (Include the sign.)
It is known by the formula mirror
1/ F = 1/U + 1/V
where U is the distance of the object form mirror = U = ?
thus, FV / (V - F) = U
or, (17)×(42) /(42 - 17) = 28.56 cm
thus, U = 28.56 cm
So, magnification of the concave mirror:
M = - V / U
or, M = - 40 cm / 28.56 cm
or, M = - 1.40
thus, magnification, M = - 1.40
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