1.

When a beam of accelerated electrons collides with a target then continuous spectrum of X-rays is emitted. Which wavelength will be absent in the spectrum of X-ray emitted from X-ray tube operated at 40 kV ?

Answer»

1.5Å
0.5Å
0.25Å
1Å

Solution :Using `lambda_(m)=(1240)/(V) xx 10^(-9)`m we GET,
`lambda_(m) =(1240)/(40 xx 10^(3)) xx 10^(-9)`
`=0.31 xx 10^(-10)=0.31 Å`
Here 0.25 Å is LESS than `lambda_(m)`, THUS 0.25 Å is not emitted,


Discussion

No Comment Found

Related InterviewSolutions