**Sample Prblem 40-1a**
The least possible energy is 37.58ev

**Sample Prblem 40-1b**
The energy to be transferred is 300.66ev

**Sample Prblem 40-1c**
The wavelength of photon is 4.13nm

**Sample Prblem 40-1d**
The possible wavelength of photon is :
	 4.13nm
	 11.01nm
	 6.61nm