In the figure, stick figure O stands in front of a spherical mirror that is moun

Question

In the figure, stick figure O stands in front of a spherical mirror that is mounted within the boxed region; the central axis through the mirror is shown. The four stick figures I1 to I4 suggest general locations and orientations for the images that might be produced by the mirror. (The figures are only sketched in; neither their heights nor their distances from the mirror are drawn to scale.)

a.) Which of the stick figures could not possibly represent images?

b.) Of the possible images, which would be due to a concave mirror?

c.) Of the possible images, which would be due to a convex mirror?

d.) Of the possible images, which would be virtual?

e.) Of the possible images, which would involve negative magnification??

The answers I got were:

a.) I1 - correct
b.) I2 - INCORRECT
c.) I3 - correct
d.) I3 - correct
e.) I2 - correct

Explanation / Answer

In case of spherical mirrors

I) if image is real then it will be inverted

2) if image is virtual then it will be erect.

3) real image is formed always on same side of mirror where object is placed .

4)virtual image is formed on side opposite to where object is placed .

Now for

a) I1 (real image cannot be (erect) and I4(virtual image cannot be inverted) .

b)I3 and I2 ( concave mirror can form real as well as virtual image).

c)I3 ( convex mirror always forms virtual image)

d)I3 ( virtual images are erect and behind the mirror).

e) - ve magnification implies real image which is I2

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