`1Å=` . . . . . nm.

1 fm=... nm

1fm =..... Å

H-atom is exposed to electromagnetic radiation of lambda=1025.6 Å and excited atom gives out induced radiation. What is the minimum wavelength of the induced radiation? (a) 102.6 nm (b) 12.09 nm (c) 121.6 nm (d) 810.8 nm

Complete the following: 1 m = .............. Å

Complete the following: 1 micron = ......... Å

Name the radiations : whose wavelength range is from 100 Å to 4000 Å (or 10 nm to 400 nm).