Sample PAPER-4

PHYSICAL SCIENCE

REFRACTION OF LIGHT AT CURVED SURFACES

I.ANSWER THE FOLLOWING QUESTIONS                                                         3 X 2 = 6 M

1. Write sign convention rules?

2. What is lens makers formula? Explain it terms?

3.  Find the refractive index of the glass which is a symmetrical convergent lens       equal to the radius of curvature of its surface?

II.ANSWER THE FOLLOWING QUESTIONS                                                        4 X 4 = 16 M

4. State the differences between convex and concave lens?

5.  How do you find the focal length of a lens experimentally?

6. .Define the terms 1) Centre of curvature          2) Radius of curvature          3) Focus            4) Focal length                      5) Optic centre                       6) Principal axis 

7.  Draw ray diagrams for the following positions and explain the nature and position of image.      i. Object is placed at 2F2      ii. Object is placed between F2 and optic centre P?

III.ANSWER THE FOLLOWING QUESTIONS                                                        3 X 1 = 3 M

8. Write the formula of refraction at plane surfaces?

9. Write the lens formula and explain the terms in it?

10. Write the formula of refraction at curved surfaces?

ALL THE BEST 

PLEASE POST YOUR FEEDBACK ON COMMENT SECTION 

CLICK ON FOLLOW BUTTON .