Q&A - Ask Doubts and Get Answers

Sort by :
Clear All
Q
Medical
95 Views   |  

If the focal length of objective lens is increased then magnefying power of:

  • Option 1)

    microscope will increase but that of telescope decrease.

  • Option 2)

    microscope and telescope both will increase.

  • Option 3)

    microscope and telescope both will decrease.

  • Option 4)

    microscope will decrease but that of telescope increase.

 
  Compound Microscope -   - wherein is distance from objective. Distance from eyepiece. Maximum magnification     Astronomical Telescope -   - wherein = focal length of objective focal length of eyepiece    For microscope magnifying power  For telescope magnifying power   magnifying power of microscope decreases and that of telescope increases Option 1) microscope will increase but...
Medical
83 Views   |  

In the Young's double-slit experiment, the intensity of light at a point on the screen where the path difference is \lambda is K, (\lambda being the wave length of light used). The intensity at a point where the path difference is \frac{\lambda }{4}, will be:

  • Option 1)

    K

  • Option 2)

    \frac{K}{4}

  • Option 3)

    \frac{K}{2}

  • Option 4)

    Zero

 
  Resultant Intensity of two wave - - wherein Intencity of wave 1 Intencity of wave 2 Phase difference      at a point where path difference is  When path a difference is   phase difference = Option 1) This option is incorrect  Option 2) This option is incorrect  Option 3) This option is correct  Option 4) This option is incorrect 
Medical
102 Views   |  

A beam of light \lambda =600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between first dark fringes on either side of the central bright fringe is:

  • Option 1)

    1.2 cm

  • Option 2)

    1.2 mm

  • Option 3)

    2.4 cm

  • Option 4)

    2.4 mm

 
As we learnt in Fraunhofer Diffraction -   - wherein Condition of nth minima. slit width angle of deviation    distance between first daic fringe on both side means width of central maxima  Option 1) 1.2 cm This is incorrect option  Option 2) 1.2 mm This is incorrect option  Option 3) 2.4 cm This is incorrect option  Option 4) 2.4 mm This is correct option 
Exams
Articles
Questions