Question

Calculate the mass and velocity of 2 MeV electron. *
Your answer​

Answer 1

Answer:

Effective mass m

eff

=

0.511

9.1×10

−31

×2

=35.61×10

−31

kg

Mass of moving electron =

1−(

c

u

)

2

m

rest

35.6×10

−31

=

1−(

3×10

10

u

)

2

9.1×10

−31

15.3=

1−(

3×10

10

u

)

2

1

0.065=1−(

3×10

10

u

)

2

0.935=(

3×10

10

u

)

2

u=2.9×10

10

cm/s