(i)
(a) \(\frac{1}{4}\) × \(\frac{1}{4}\) = \(\frac{1}{16}\)
(b) \(\frac{1}{4}\) × \(\frac{3}{5}\) = \(\frac{3}{20}\)
(c) \(\frac{1}{4}\) × \(\frac{4}{3}\) = \(\frac{1}{3}\)
(ii)
(a) \(\frac{1}{7}\) × \(\frac{2}{9}\) = \(\frac{2}{63}\)
(b) \(\frac{1}{7}\) × \(\frac{6}{5}\) = \(\frac{6}{35}\)
(c) \(\frac{1}{7}\) × \(\frac{3}{10}\) = \(\frac{3}{70}\)
Match the items given in Column I with one or more items of Column II.
Column I | Column II |
(a) A plane mirror | (i) Used as a magnifying glass. |
(b) A convex mirror | (ii) Can form image of objects spread over a large area. |
(c) A convex lens | (iii) Used by dentists to see enlarged image of teeth. |
(d) A concave mirror | (iv) The image is always inverted and magnified. |
(e) A concave lens | (v) The image is erect and of the same size as the object. |
- | (vi) The image is erect and smaller in size than the object. |