You have three lenses L 1 , L 2 and L 3 of power +10 D , + 5 D and -10 D respectively. State the nature and focal length of each lens. Explain which of the three lens will form a Virtual and magnified image of an object placed at 15 cm from the lens.

To use anything transparent

Did you ever figue this

Molybdeum(mo)orruthenium (ru)actually, elements with similar chemical properties as technetium would bemn, re, and bh. this is because elements in the same group/family (column) have similar chemical properties. elements in the same period (row) have the same number of energy levels (or shells).