An object is held 81.4 cm away from a mirror. The mirror has a focal length of 9

Question

An object is held 81.4 cm away from a mirror. The mirror has a focal length of 94 cm.

a.) Determine the image distance.
_______cm

b.) Determine the magnification.
_______

c.) If the object is 6.7 cm long, determine the image height.
______cm


d.) Which of the following are true about the image? Choose all that apply.

The image is virtual.
The image is upright.
The image is inverted.
The image is real.


e.) Which of the following are true about the mirror? Choose all that apply.

The mirror is diverging.
The mirror is concave.
The mirror is converging.
The mirror is convex

Explanation / Answer

Given that Object distance, p = 81.4 cm The focal lenght, f = 94 cm a) Image distance is given by (1/q) = (1/f) - (1/p) From the above     q = -607.3 cm b) The magnification, M = -q/p = 7.5 c) The height of the object, h1 = 6.7 cm Then the image height is     h2/h1 = -q/p     h2 = (-q/p)h1 = 50.25 cm d) The image is virtual and upright e) The mirror is diverging and concave mirror

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