The mirror shown in this photo is a concave mirror. Use this photo to answer the
ID: 1780393 • Letter: T
Question
The mirror shown in this photo is a concave mirror. Use this photo to answer the following questions.
A. Which of the following are true? Choose all that apply.
It's a real image.
It's a virtual image.
The image is inverted.
The image is upright.
The mirror is converging.
The mirror is diverging.
B. Which of the following are true? Choose all that apply.
The image distance is positive.
The image distance is negative.
The image height is positive.
The image height is negative.
The magnification is positive.
The magnification is negative.
The focal length is positive.
The focal length is negative.
Explanation / Answer
A.
Image is real-it can be captured on a screen
It is inverted and the mirror is converging - The image is down,the base of the object has gone to top,similarly the key board is above the Screen in the image
B.
Image distance is negative ( convention is that distance is always measured from pole, in this case image is formed on left side of Pole and hence is negative.
image height is negative - vertical distance above axis are positive and below axis are negative.
Magnification is -ve - because image is upright
The focal length is negative- all distances are measured from Pole of the mirror and measurements in direction of incident ray are positive and vice versa. - This is called sign convention
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