An object 4 cm high is kept 20 CM in front of a mirror which forms its real and inverted image of same size at the same. Identify the mirror and find its focal length
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the mirror is concave
the focal length is 10cm because the image is formed at point of object so it is the centre of curvature then the focal lenght will be half of it that is 20/2 =10
the focal length is 10cm because the image is formed at point of object so it is the centre of curvature then the focal lenght will be half of it that is 20/2 =10
angel14510:
wouldn't feel be negative in case of concave mirror??
I meant f
thank u:)
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The case is possible only when the mirror is a conacave and the object is placed at the centre of curvature. This means that the centre of curvature is 20 CM away from the pole or radius of the mirror is 20cm
F=R/2=20/2=10cm
F=R/2=20/2=10cm
wouldn't f be negative as it is concave mirror??
thank u
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