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A man can take pictures of those objects...

A man can take pictures of those objects which are not fully visible to the eye using camera films acceptable to

A

ultraviolet rays

B

sodium light

C

visible light

D

infra-red rays

Text Solution

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The correct Answer is:
D
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Collision is a physical process in which two or more objects, either particle masses or rigid bodies, experience very high force of interaction for a very small duration. It is not essential for the objects to physically touch each other for collision to occur. Irrespective of the nature of interactive force and the nature of colliding bodies, Newton's second law holds good on the system. Hence, momentum of the system before and after the collision remains conserved if no appreciable external force acts on the system during collision. The amount of energy loss during collision, if at all, is indeed dependent on the nature of colliding objects. The energy loss is observed to be maximum when objects stick together after collision. The terminology is to define collision as 'elastic' if no energy loss takes place and to define collision as 'plastic' for maximum energy loss. The behaviour of system after collision depends on the position of colliding objects as well. A unidirectional motion of colliding objects before collision can turn into two dimensional after collision if the line joining the centre of mass of the two colliding objects is not parallel to the direction of velocity of each particle before collision. Such type of collision is referred to as oblique collision which may be either two or three dimensional. For which of the following collisions, the external force acting on the system during collision is not appreciable as mentioned in paragraph 1.

Collision is a physical process in which two or more objects, either particle masses or rigid bodies, experience very high force of interaction for a very small duration. It is not essential for the objects to physically touch each other for collision to occur. Irrespective of the nature of interactive force and the nature of colliding bodies, Newton's second law holds good on the system. Hence, momentum of the system before and after the collision remains conserved if no appreciable external force acts on the system during collision. The amount of energy loss during collision, if at all, is indeed dependent on the nature of colliding objects. The energy loss is observed to be maximum when objects stick together after collision. The terminology is to define collision as 'elastic' if no energy loss takes place and to define collision as 'plastic' for maximum energy loss. The behaviour of system after collision depends on the position of colliding objects as well. A unidirectional motion of colliding objects before collision can turn into two dimensional after collision if the line joining the centre of mass of the two colliding objects is not parallel to the direction of velocity of each particle before collision. Such type of collision is referred to as oblique collision which may be either two or three dimensional. According to the definition of collision in paragraph I, which of the following physical process is not a collision?

Collision is a physical process in which two or more objects, either particle masses or rigid bodies, experience very high force of interaction for a very small duration. It is not essential for the objects to physically touch each other for collision to occur. Irrespective of the nature of interactive force and the nature of colliding bodies, Newton's second law holds good on the system. Hence, momentum of the system before and after the collision remains conserved if no appreciable external force acts on the system during collision. The amount of energy loss during collision, if at all, is indeed dependent on the nature of colliding objects. The energy loss is observed to be maximum when objects stick together after collision. The terminology is to define collision as 'elastic' if no energy loss takes place and to define collision as 'plastic' for maximum energy loss. The behaviour of system after collision depends on the position of colliding objects as well. A unidirectional motion of colliding objects before collision can turn into two dimensional after collision if the line joining the centre of mass of the two colliding objects is not parallel to the direction of velocity of each particle before collision. Such type of collision is referred to as oblique collision which may be either two or three dimensional. According to the definition of oblique collision in the paragraph, which of the following collisions cannot be oblique'?

RESONANCE ENGLISH-ELECTRO MAGNETIC WAVES-Exercise
  1. An electromagnetic wave going through vacuum is described by E= E0 s...

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  2. Finger prints on a piece of paper may be detected by sprinkling floure...

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  3. The displacement current flows in the dielectric of a capacitor when t...

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  4. Which of the following ray are not electromagnetic waves

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  5. If lambda(v) , lambda(x) and lambda(m) represent the wavelength of v...

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  6. The frequence of a light wave in a material in 2xx10^(14) Hz and wavel...

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  7. The electric and magnetic field of an electromagnetic wave are:-

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  8. The velocity of electromagnetic radiation in a medium of permittivity ...

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  9. The electric field part of an electromagnetic wave in a medium is repr...

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  10. Which of the following statement is false for the properties of electr...

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  11. The electric field of an electromagnetic wave in free space is given b...

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  12. The velocity of all radiowaves in free space is 3xx10^(8),//s, the fre...

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  13. Which of these statements is false ?

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  14. Infrared spectrum lies between

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  15. A man can take pictures of those objects which are not fully visible t...

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  16. Arrange the following electromagnetic radiations in increasing order o...

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  17. Maxwell's equations describe the fundamental laws of

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  18. Heat radiations propagate with the speed of

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  19. The curve drawn between velocity and frequency of a photon in vacuum w...

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  20. Which rays are not the portion of electro-magnetic spectrum?

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