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Physics
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Dual Nature of Radiation and Matter
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JEE Advanced Questions
Dual Nature Of Radiation And Matter
Physics
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>
The allowed energy for the particle for a particular value of n is proportional to :
A
a
−
2
B
a
−
3
/
2
C
a
−
1
D
a
2
Hard
JEE Advanced
View solution
>
A pulse of light of duration 100 ns is absorbed completely by a small object initially at rest. Power of the pulse is 30
m
W
and the speed of light is
3
×
1
0
8
m
/
s
. The final momentum of the object is:
A
0
.
3
×
1
0
−
1
7
k
g
m
s
−
1
B
1
.
0
×
1
0
−
1
7
k
g
m
s
−
1
C
3
.
0
×
1
0
−
1
7
k
g
m
s
−
1
D
9
.
0
×
1
0
−
1
7
k
g
m
s
−
1
Hard
JEE Advanced
View solution
>
The speed of the particle that can take discrete values is proportional to
A
n
−
3
/
2
B
n
−
1
C
n
1
/
2
D
n
Hard
JEE Advanced
View solution
>
Light of wavelength
λ
p
h
falls on a cathode plate inside a vacuum tube as shown in the figure. The work function of the cathode surface is
ϕ
and the anode is a wire mesh of conducting material kept at a distance d from the cathode. A potential difference V is maintained between the electrodes. If the minimum de Broglie wavelength of the electrons passing through the anode is
λ
e
, which of the following statement(s) is(are) true?
A
λ
e
increases at the same rate as
λ
p
h
for
λ
p
h
<
h
c
/
ϕ
B
λ
e
is approximately halved, if d is doubled
C
λ
e
decreases with increase in
ϕ
and
λ
p
h
D
For large potential difference
(
V
>
>
ϕ
/
e
)
λ
e
is approximately halved if V is made four time
Hard
JEE Advanced
View solution
>