AIEEE Exam

In Young's double-slit experiment, the intensity
of light in front of one of the slits on a screen is
I0/2 where I0 is the maximum intensity. The
distance between the slits is 5λ where λ is the
wavelength of monochromatic light. How far
away is the screen from the slit ?
(A) 20 λ (B) 25 λ (C) 40 λ (D) 50 λ

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AIEEE Other Question

Imagine an atom made up of proton and a
hypothetical particle of double the mass of the
electron but having the same charge as the
electron. Apply the Bohr atom model and consider
all possible transitions of this hypothetical particle
of the first excited level. The longest wavelength
photon that will be emitted has wavelength λ (in
terms of the Rydberg constant R for hydrogen
atom) equal to :
(A) 9/5R (B) 36/5R (C) 18/5R (D) 4/R The distance between object and its erect but
diminished image formed due to a spherical
mirror is 3 times the distance between image and
the focus while distance between object and focus
is 2u. If the image is half in size of the object, find
the distance of the object from the mirror