Question

3. A spherical mirror produces an image of magnification -1 on a screen placed at a distance of 50 cm from the mirror.
(a) Write the type of mirror.
          (b) Find the distance of the image from the object.
          (c) What is the focal length of the mirror?
          (d) Draw the ray diagram to show the image formation in this case.

Answer 1

Answer:

A real image, such as can be formed with a convex lens, is formed by real rays of light passing through the glass and intersecting somewhere, which we interpret as an image. With convex mirrors, the light reflects off the surface at the same angle as it struck it - no light, of course, passes through the mirror. The idea of a virtual image is where the light rays from an object would meet if they actually could. Real rays spread out - draw dotted lines (they’re not ‘real’),to back-project them and where they intersect is where the image is formed. You can draw a ray diagram for yourself to ...

Continue Reading