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Consider the statements given below- (...

Consider the statements given below-
(A) The wave and the particle aspects are both neccessary for a complete description of light
(B) The wave and particle aspects cannot be revealed simultaneously in a single experiment. The-

A

A is true, B is false

B

A is false, b is true

C

Both A and B are false

D

Both A and B are true

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A
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The displacement of the medium in a sound wave is given by the equation y_(1) = A cos(ax + bt) where A , a and b are positive constants. The wave is reflected by an obstacle situated at x = 0 . The intensity of the reflected wave is 0.64 times that of the incident wave. (a) What are the wavelength and frequency of incident wave? (b) Write the equation for the reflected wave. ( c ) In the resultant wave formed after reflection, find the maximum and minimum values of the particle speeds in the medium. (d) Express the resultant wave as a superposition of a standing wave and a travelling wave. What are the positions of the antinodes of the standing wave ? What is the direction of propagation of travelling wave?

When a wave transverses in a medium, the displacement of a particle located at distance x at time t is given by y=a sin (bt-cx) where a, b and c are constants of the wave. The dimension of b//c are same as that of:

Einstein in 1905 proppunded the special theory of relativity and in 1915 proposed the general theory of relativity. The special theory deals with inertial frames of reference. The general theory of relativity deals with problems in which one frame of reference. He assumed that fixed frame is accelerated w.r.t. another frame of reference of reference cannot be located. Postulated of special theory of realtivity ● The laws of physics have the same form in all inertial systems. ● The velocity light in empty space is a unicersal constant the same for all observers. ● Einstein proved the following facts based on his theory of special relativity. Let v be the velocity of the speceship w.r.t a given frame of reference. The obserations are made by an observer in that reference frame. ● All clocks on the spaceship wil go slow by a factor sqrt(1-v^(2)//c^(2)) ● All objects on the spaceship will have contracted in length by a factor sqrt(1-v^(2)//c^(2)) ● The mass of the spaceship increases by a factor sqrt(1-v^(2)//c^(2)) ● Mass and energy are interconvertable E = mc^(2) The speed of a meterial object can never exceed the velocity of light. ● If two objects A and B are moving with velocity u and v w.r.t each other along the x -axis, the relative velocity of A w.r.t. B = (u-v)/(1-uv//v^(2)) One cosmic ray particle appraches the earth along its axis with a velocity of 0.9c towards the north the and another one with a velocity of 0.5c towards the south pole. The relative speed of approcach of one particle w.r.t. another is-

Given below are some examples of wave motion. State in each case if the wave motion is transverse , longitudinal or a combination of both: (a) Motion of a kink in a longitudinal spring produced by displacing one end of the spring sideways. (b) Waves produced in a cylinder containing a liquid by moving its piston back and forth. (c) Waves produced by a motorboat sailing in water. (d) Ultrasonoic waves in air produced by a vibrating quartz crystal.

Given below are some examples of wave motion. State in each case if the wave motion is transverse, longitudinal or a combination of both: (a) Motion of a kink in a longitudinal spring produced by displacing one end of the spring sideways. (b) Waves produced in a cylinder containing a liquid by moving its piston back and forth. (c ) Waves produced by a motorboat sailing in water. (d) Ultrasonic waves in air produced by a vibrating quartz crystal.

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The mass of a nucleus ._(Z)^(A)X is less that the sum of the masses of (A-Z) number of neutrons and Z number of protons in the nucleus.The energy equivalent to the corresponding mass difference is known as the binding energy of the nucleus. A heavy nucleus of mass M can break into two light nuclei of masses m_(1) and m_(2) only if (m_(1)+m_(2)) lt M . Also two light nuclei of masses m_(3) and m_(4) can undergo complete fusion and form a heavy nucleus of mass M'. only if (m_(3)+m_(4)) gt M' . The masses of some neutral atoms are given in the table below: |{:(._(1)^(1)H ,1.007825u , ._(1)^(2)H,2.014102u,._(1)^(3)H,3.016050u,._(2)^(4)He,4.002603u),(._(3)^(6)Li,6.015123u,._(3)^(7)Li,7.016004u,._(30)^(70)Zn,69.925325u, ._(34)^(82)Se,81.916709u),(._(64)^(152)Gd,151.91980u,._(82)^(206)Pb,205.974455u,._(83)^(209)Bi,208.980388u,._(84)^(210)Po,209.982876u):}| Taking kinetic energy ( in KeV ) of the alpha particle, when the nucleus ._(84)^(210)P_(0) at rest undergoes alpha decay, is:

Consider a one -dimensional motion of a particle with total energy E. There are four regions A,B,C and D in which the relation between potential energy E. There are four regions A,B,C and D in which the relation between potential energy V, kinetic energy (K) and total energy E is as given below Region A : V gt E Region B: V lt E Region C :K gt E Region D : V gt E . State with reasons in each

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  2. The ratio of deBroglie wavelegth of a proton and an a-particle acceler...

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  3. The ratio of de Broglie wavelengths of a proton and a neutron moving w...

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  4. In a TV tube the electron are accelerated by a potential difference of...

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  5. The group velocity of the de Broglie wave packet associated with a par...

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  6. If kinetic energy of an electron is increases by 69% then what is the ...

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  7. An alpha-particle moves in curcular path of radius 0.83 cm in the pres...

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  8. A radioactive element X disintegrates successively as under If...

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  9. A radioactive element X disintegrates successively as under If...

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  10. If 20 gm of a radioactive substance due to radioactive decay reduces t...

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  11. A radioactive nucleus X converts into nucleus Y by emitting B^+. If a...

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  12. In the given radioactive disintegration series .(92)^(235)U rarr(82)...

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  13. The initial count rate for a radioactive source was found to be 1600 c...

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  14. 1 gram of a radioactive element reduces to 1/3 gram at the end of 2 d...

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  15. The radius of the nucleus of ""(8)O^(16) is 3 × 10^(–15) m. Its densit...

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  16. The ratio of the radii of the nuclei ""(13)Al^(27) and ""(52)Te^(125) ...

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  17. 200 MeV of energy is obtained in the fission of one nucleus of U^(235...

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  18. The binding energy per nucleon of O^16 is 7.97 MeV and that of O^17 is...

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  19. A particle is projected at an angle 60^@ from Horizon from ground with...

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