Answer to Question #279082 in Physics for xieess

Question #279082

3. What is the image distance and image height if a 14.00 cm tall object is placed 30.0 cm from a concave mirror having a focal length of 20.0 cm?

1
Expert's answer
2021-12-13T16:55:57-0500

By the mirror equation:


1f=1o+1i, 120=130+1i, i=6 cm.\frac 1f=\frac 1o+\frac1i,\\\space\\ \frac 1{20}=\frac 1{30}+\frac1{i},\\\space\\ i=6\text{ cm}.

Image height:


hi=ioho=28 cm (inverted)h_i=-\frac ioh_o=-28\text{ cm (inverted)}



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