In an electron microscope, electron are accelerated to great velocities. calculate the wavelength of an electron travelling with a velocity of 7.0 megameters per second. the mass of an electron is 9.1 ✖ 10 power -28 g
Answers
Answer:
λ=
mv
h
The concept of mass in this case should be the resistance to change in velocity of an object subjected to a certain force. According to special theory of relativity, for a given amount of force, the degree of resistance to increase in velocity of a matter increases as the original velocity approaches that of light. For the electron in this context, its velocity is quite high. So, mass at that velocity.
mv=
(1−(
c
v
)
2
)
m
o
m
o
=rest mass of electron
=9.1×10
−31
kg
=9.1×10
−28
g
Answer:
h x y velocity
Explanation:
λ=
mv
h
The concept of mass in this case should be the resistance to change in velocity of an object subjected to a certain force. According to special theory of relativity, for a given amount of force, the degree of resistance to increase in velocity of a matter increases as the original velocity approaches that of light. For the electron in this context, its velocity is quite high. So, mass at that velocity.
mv=
(1−(
c
v
)
2
)
m
o
m
o
=rest mass of electron
=9.1×10
−31
kg
=9.1×10
−28
g