Question

A spherical mirror produces an image 48 cm, in front it, when an object is positioned 12 cm from its pole.
5. Draw the ray diagram, showing the formation of the image in the above case.(1)
6. If the object size is 5 mm, calculate the size of the image formed.(1)

7. Write any two applications of the type of spherical mirror used here.(1)
8. Calculate the focal length of the mirror (1)
9. Calculate the magnification of the image(1)
10. In the above situation

Answer 1

Answer:

5. It is answered in the attached document.

6. Magnification m = $-\frac{v}{u}$

                           m = $- (\frac{-48}{-12} )$ = -4

Size of the image formed = 5mm x -4 = -20mm

7. The concave mirrors are used in:

i) Shaving mirrors

ii) Astronomical telescopes

8. $\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$

=>$\frac{1}{f} = \frac{1}{-48} + \frac{1}{-12}$

=>$\frac{1}{f} = \frac{-5}{48}$

=> $f= \frac{-48}{5}$

9. Magnification m = $-\frac{v}{u}$

                           m = $- (\frac{-48}{-12} )$ = -4