Q6 of 123 Page 410

The image formed by a concave mirror

A virtual object is a virtual image of a real object and is created behind the mirror, hence image of that must be formed in front of the mirror, and it is real.

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4

A point object is placed at a distance of 30 cm from a convex mirror of focal length 30 cm. The image will form at

 5

Figure (18-Q2) shows two rays A and B being reflected by a mirror and going as A’ and B’. The mirror


 7

Figure (18-Q3) shows three transparent media of refractive indices μ1, μ2 and μ3. A point object O is placed in the medium μ2. If the entire medium on the right of the spherical surface has refractive index μ1, the image forms at O’. If this entire medium has refractive index μ3, the image forms at O’’. In the situation shown,


 8

Four modifications are suggested in the lens formula to include the effect of the thickness t of the lens. Which one is likely to be correct?