Home
Class 12
PHYSICS
A beam of fast moving alpha particles we...

A beam of fast moving alpha particles were directed towards a thin film of gold. The parts `A', B'` and `C'` of the transmitted and refected beams correcponding ro the incident parts `A, B` and `C` of the beam, are shown in the adjoining diagram. The number of alpha particles in

A

B' will be minimum and in C' maximum

B

A' will be maximum and in B' minimum

C

A' will be minimum and in B' maximum

D

c' will be minimum and in B' maximum

Text Solution

Verified by Experts

The correct Answer is:
B
Because atom is hollow and whole mass fo atom is concentrated in a small centre called nucleus. So, A' will be maximum whille B' minimum.
Promotional Banner

Topper's Solved these Questions

  • ATOMS

    DC PANDEY ENGLISH|Exercise ASSERTION AND REASON|10 Videos

  • ATOMS

    DC PANDEY ENGLISH|Exercise MATCH THE COLUMNS|4 Videos

  • ATOMS

    DC PANDEY ENGLISH|Exercise Check point 12.3|15 Videos

  • ALTERNATING CURRENT

    DC PANDEY ENGLISH|Exercise JEE MAIN|62 Videos

  • CAPACITORS

    DC PANDEY ENGLISH|Exercise OBJECTIVE_TYPE|1 Videos

Similar Questions

Explore conceptually related problems

In the electric circuit shown in Fig., label the parts A, B, C, D, E, and E State the function of each part. Show in the diagram the direction of flow of current.

In the electric circuit shown in Fig. 1, label the parts A, B, C, D, E, and F State the function of each part. Show in the diagram the direction of flow of current.

A beam of mixture of alpha particle and protons are accelerted through same potential difference before entering into the magnetic field of strength B. if r_1=5 cm then r_2 is

Fig. 12.8 shows a mixed source R of alpha and beta particles in a thick lead walled container. The particles pass through a magnetic field in a direction perpendicular to the plane of paper inwards as shown by x. (a) Show in the diagram how the particles get affected. (b) Name the law used in part (a). [Hint : alpha particles will deflect to the left while beta particles to the right]

A particle of mass m = 1.6 X 10^(-27) kg and charge q = 1.6 X 10^(-19) C moves at a speed of 1.0 X10^7 ms^(-7) . It enters a region of uniform magnetic field at a point E, as shown in The field has a strength of 1.0 T. (a) The magnetic field is directed into the plane of the paper. The particle leaves the region of the filed at the point F. Find the distance EF and the angle theta. (b) If the field is coming out of the paper, find the time spent by the particle in the regio the magnetic feld after entering it at E .

Thin films, including soap bubbles and oil show patterns of alternative dark and bright regions resulting from interference among the reflected ligth waves. If two waves are in phase, their crests and troughs will coincide. The interference will be cosntructive and the amlitude of resultant wave will be greater then either of constituent waves. If the two wave are not of phase by half a wavelength (180^(@)) , the crests of one wave will coincide width the troughs of the other wave. The interference will be destructive and the ampliutde of the resultant wave will be less than that of either consituent wave. 1. When incident light I, reaches the surface at point a, some of the ligth is reflected as ray R_(a) and some is refracted following the path ab to the back of the film. 2. At point b, some of the light is refracted out of the film and part is reflected back through the film along path bc. At point c, some of the light is reflected back into the film and part is reflected out of the film as ray R_(c) . R_(a) and R_(c) are parallel. However, R_(c) has travelled the extra distance within the film fo abc. If the angle of incidence is small, then abc is approxmately twice the film's thickness . If R_(a) and R_(c) are in phase, they will undergo constructive interference and the region ac will be bright. If R_(a) and R_(c) are out of phase, they will undergo destructive interference and the region ac will be dark. I. Refraction at an interface never changes the phase of the wave. II. For reflection at the interfere between two media 1 and 2, if n_(1) gt n_(2) , the reflected wave will change phase. If n_(1) lt n_(2) , the reflected wave will not undergo a phase change. For reference, n_(air) = 1.00 . III. If the waves are in phase after reflection at all intensities, then the effects of path length in the film are: Constrictive interference occurs when 2 t = m lambda // n, m = 0, 1,2,3 ,... Destrcutive interference occurs when 2 t = (m + (1)/(2)) (lambda)/(n) , m = 0, 1, 2, 3 ,... If the waves are 180^(@) out of the phase after reflection at all interference, then the effects of path length in the film ara: Constructive interference occurs when 2 t = (m + (1)/(2)) (lambda)/(n), m = 0, 1, 2, 3 ,... Destructive interference occurs when 2 t = (m lambda)/(n) , m = 0, 1, 2, 3 ,... The average human eye sees colors with wavelength between 430 nm to 680 nm. For what visible wavelength (s) will a 350 nm thick (n = 1.35) soap film produce maximum destructive interference?

A beam of equally charged particles after being accelerated through a voltage V enters into a magnetic field B as shown in Fig. 1.31. It is found that all the particles hit the plate between C and D. Find the ratio between the masses of the heaviest and lightest particles of the beam.

Three particles are projected in the air with the minimum possible speeds, such that the first goes from A to B, the second goes from B to C and the third goes from C to A. Points A and C are at the same horizontal level. The two inclines make the same angle alpha with the horizontal, as shown. The relation among the projection speeds of the three particles is

Three (A,B,C) particle each of mass m are connected by three mass-less rod of length l. All three particle lies on smooth horizontal plane. A particle of mass moving along one of the rod with velocity v_(0) strikes on a particle and stops as shown in diagram. Angular velocity of eachh particle after collision is.

A velocity filter uses the properties of electric and magnetic field to select particles that are moving with a specifice velocity. Charged particles with varying speeds are directed into the filter as shown. The filter consistt of an electric field E and a magnetic field B, each of constant magnitude, directed perpendicular to each other as shown, The charge particles will experience a force due to electric field given by F = qE. If positively charged particles are used, this force is towards right. The moving particle will also experience a force due to magnetic field given by F = qvB. When forces due to the two fields are of equal magnitude, the net force on the particle will be zero, the particle will pass through centre with its path unaltered. The electric and magnetic fields can be adjusted t choose the specific velocity to be filtered. The efect of gravity can be neglected. If the filter is set to detect particles of speed v_(0) , which one of the following diagrams best illustrates how the magnitude of the particle acceleration (a) depends on velocity v?

DC PANDEY ENGLISH-ATOMS-Taking it together
  1. A hydrogen-like atom emits radiation of frequency 2.7 xx 10^(15) Hz wh...

    Text Solution

    |

  2. Two H atoms in the ground state collide inelastically. The maximum amo...

    Text Solution

    |

  3. A beam of fast moving alpha particles were directed towards a thin fil...

    Text Solution

    |

  4. Figure shows the enegry levels P, Q, R, S and G of an atom where G is ...

    Text Solution

    |

  5. The binding energy of a H-atom considering an electron moving aroun...

    Text Solution

    |

  6. If the intensity of an X-ray becomes (I(0))/(2) from I(0) after travel...

    Text Solution

    |

  7. In the following figure the energy levels of hydroge atom have been sh...

    Text Solution

    |

  8. The ionization enegry of the electron in the hydrogen atom in its grou...

    Text Solution

    |

  9. If an electron is revolving around the hydrogen nucleus at a distance ...

    Text Solution

    |

  10. Imagine an atom made of a proton and a hypothetical particle of double...

    Text Solution

    |

  11. For a certain atom, there are energy levels A,B,C corresponds to energ...

    Text Solution

    |

  12. The electron in a hydrogen atom makes a transition n(1) rarr n(2), whe...

    Text Solution

    |

  13. If electron with principal quantum number n gt 4 were not allowed in n...

    Text Solution

    |

  14. The following diagram indicates the energy levels of a certain atom wh...

    Text Solution

    |

  15. The diagram shows the energy levels for an electron in a certain atom....

    Text Solution

    |

  16. When the voltage applied to an X-ray tube is increased from V(1)=10 k...

    Text Solution

    |

  17. The ionisation potential of hydrogen atom is -13.6 eV. An electron in...

    Text Solution

    |

  18. The distance of closest approach of an alpha-particle fired towards a ...

    Text Solution

    |

  19. The first excited state of hydrogen atom is 10.2 eV above its ground s...

    Text Solution

    |

  20. Hydrogen (.(1)H^(1)), Deuterium (.(1)H^(2)), singly ionised Helium (...

    Text Solution

    |