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A point source of light S is placed at the bottom of a vessel containg a liquid of refractive index 5/3. A person is viewing the source from above the surface. There is an opaque disc of radius 1cm floating on the surface. The centre of the disc lies vertically above the source S. The liquid from the vessel is gradually drained out through a tap. What is the maximum height of the liquid for which the source cannot at all be seen from above?
11
Sep
A point source of light S is placed at the bottom of a vessel containg a liquid of refractive index 5/3. A person is viewing the source from above the surface. There is an opaque disc of radius 1cm floating on the surface. The centre of the disc lies vertically above the source S. The [...]
Consider a hydrogen like atom whose energy in nth excited state is given by En = 13.6Z^2/n^2 When this excited atom makes a transition from excited state to ground state, most energetic photons have energy
11
Sep
Consider a hydrogen like atom whose energy in nth excited state is given by En = 13.6Z^2/n^2 When this excited atom makes a transition from excited state to ground state, most energetic photons have energy Consider a hydrogen like atom whose energy in nth excited state is given by En = 13.6Z^2/n^2 When this excited [...]
Light enters at an angle of incidence in a transparent rod of refractive index n. For what value of the refractive index of the material of the rod the light once entered into it will not leave it through its lateral face whatsoever be the value of angle of incidence.
11
Sep
Light enters at an angle of incidence in a transparent rod of refractive index n. For what value of the refractive index of the material of the rod the light once entered into it will not leave it through its lateral face whatsoever be the value of angle of incidence. A ray of light travels [...]
Explain why nearly all H atoms are in the ground state at room temperature and hence emit no light.
11
Sep
Explain why nearly all H atoms are in the ground state at room temperature and hence emit no light. Explain why nearly all H atoms are in the ground state at room temperature and hence emit no light. September 11, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
A shell of mass 10 kg is moving with a velocity of 10ms^−1 when it blasts and forms two parts of mass 9 kg and 1 kg respectively. If the 1st mass is stationary, the velocity of the 2nd mass is:
11
Sep
A shell of mass 10 kg is moving with a velocity of 10ms^−1 when it blasts and forms two parts of mass 9 kg and 1 kg respectively. If the 1st mass is stationary, the velocity of the 2nd mass is: A shell of mass 10 kg is moving with a velocity of 10ms^−1 when [...]
Two balls, having linear momenta p1=pi^ and p2=−pi^, undergo a collision in free space. There in son external force acting on the ball. Let p1 and p2 be their final momenta. Which of the following option(s) is (are) NOT ALLOWED for any non-zero value of p,a1,a2,b1,b2,c1 and c2
11
Sep
Two balls, having linear momenta p1=pi^ and p2=−pi^, undergo a collision in free space. There in son external force acting on the ball. Let p1 and p2 be their final momenta. Which of the following option(s) is (are) NOT ALLOWED for any non-zero value of p,a1,a2,b1,b2,c1 and c2 6N and 8N. The resultant acceleration of [...]
A stationary body of mass 3 kg explodes into three equal pieces. Two of the pieces fly off in two mutually perpendicular directions, One with a velocity of 3 i m/s and the other with a velocity of 4 j m/s. If the explosion takes place in 10^−4s, the average force acting on the third piece in newtons is :
11
Sep
A stationary body of mass 3 kg explodes into three equal pieces. Two of the pieces fly off in two mutually perpendicular directions, One with a velocity of 3 i m/s and the other with a velocity of 4 j m/s. If the explosion takes place in 10^−4s, the average force acting on the third [...]
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A stationary body of mass 3 kg explodes into three equal pieces. Two of the pieces fly off in two mutually perpendicular directions ,
One with a velocity of 3 i m/s and the other with a velocity of 4 j m/s. If the explosion takes place in 10^−4s ,
the average force acting on the third piece in newtons is : ,
A neutron with an energy of 4.6 MeV collides elastically with protons and is retarded. Assuming that upon each collision the neutron is deflected by 45, find the number of collisions which will
11
Sep
A neutron with an energy of 4.6 MeV collides elastically with protons and is retarded. Assuming that upon each collision the neutron is deflected by 45, find the number of collisions which will A neutron with an energy of 4.6 MeV collides elastically with protons and is retarded. Assuming that upon each collision the neutron [...]
A shell of mass 5M, acted upon by no external force and initially at rest, bursts into three fragments of masses M, 2M and 2M respectively. The first two fragments move in opposite directions with velocities of magnitudes 2v and v respectively. The third fragment will:
11
Sep
A shell of mass 5M, acted upon by no external force and initially at rest, bursts into three fragments of masses M, 2M and 2M respectively. The first two fragments move in opposite directions with velocities of magnitudes 2v and v respectively. The third fragment will: 2M and 2M respectively. The first two fragments move [...]
A ray of light travels from an optically denser to rarer medium. The critical angle for the two media is C. the maximum possible deviation of the way will be
11
Sep
A ray of light travels from an optically denser to rarer medium. The critical angle for the two media is C. the maximum possible deviation of the way will be A ray of light travels from an optically denser to rarer medium. The critical angle for the two media is C. the maximum possible deviation [...]