- 2-7 The Threshold frequency Do for o metal 98 4.0 X 1094 8! Cataudte the kinetic energy of an electron emmitted when a nadick 1-on of frequency d = 4.5 x 1014 8 - a hits the metal ? X 1
Answers
Answered by
0
Answer:
Given that,
v
o
=7.0×10
14
s
−1
v=1.0×10
15
s
−1
As we know, hv=hv
0
+
2
1
mv
2
i.e. h(v−v
0
)=K.E.
∴K.E.=(6.626×10
−34
)×(1.0×10
15
−7.0×10
14
)=6.626×10
−34
×10
14
(10−7)
∴K.E=19.878×10
−20
J
Similar questions