Page 3 - X-CBQ-Worksheet-LIGHT

a) Which of these can be concluded from diagram 1?
i. Image is formed at the focus.
ii. Size of the image is equal to the size of the object.
iii. Distance between pole and centre of curvature is twice the focal
length.
iv. Distance between the image and focus is half the distance between
the object and focus.

b) Which diagram shows a real, inverted and enlarged image formed by the
mirror?
i. Diagram 1
ii. Diagram 2
iii. Diagram 3
iv. Diagram 4

c) In which condition does a concave mirror produce a virtual image?
i. When object is located within the focal length
ii. When object is located at the centre of curvature
iii. When object is located in between ininity and the centre of
curvature
iv. When object is located in between the centre of curvature and the
focus
16. The table below shows the refractive index of different materials. 3

The formula for calculating the refractive index (n ) of a material is,
ℎ
nm =
ℎ ℎ

a) What does X stand for?
b) What does the refractive index of kerosene with flint glass refer to? Justify
with a brief explanation.
17. A concave lens has a power of -2.0D. It forms an image of an object at a 3
distance of 10 cm from the lens.
a) Find the distance of the object from the lens.
b) Find the magnification produced.
18. A light ray is incident on the wall of a glass tank as shown below. 3

Draw a rough diagram of the path of the light ray as it passes through the
glass tank and the water and emerges again into air. Draw the normal at
each interface.