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~christina~
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Homework Statement
(a) On a sunny afternoon in April, three physics students took a mirror and a screen to the roof of a building. They selected a distant building, and while one student held the mirror a second one adjusted the distance between the screen and the mirror in an attempt to form a clear image of the building on the screen. Once the clear sharp image was formed on the screen, the third student made a measurement several times, took the average of these measurements, and then concluded that the focal length of the mirror is 17.5 cm.
(i) Describe the measurement made and explain how this measurement gives the focal length of the mirror.
(ii) What type of mirror did the students take to the roof?
(iii)Was the image on the screen real or virtual?; upright or inverted?; enlarged or reduced?
(b) Upon returning to the classroom, the students placed the mirror on an optical bench. An object was placed 22 cm in front of the mirror. Is an image formed on the screen for this object distance? If no, explain. If yes, find the characteristics (that is, the location, orientation, magnification, etc.) of the image formed.
Homework Equations
The Attempt at a Solution
(i) Describe the measurement made and explain how this measurement gives the focal length of the mirror.
(ii) What type of mirror did the students take to the roof?
I say it's a concave mirror.
(iii)Was the image on the screen real or virtual?; upright or inverted?; enlarged or reduced?
It's inverted, and reduced as well. and the image is a real image.
Are my ideas right?
Thanks