If the two slits in Young's double slit experiment are of unequal width, then
the dark fringes are not perfectly dark
the bright fringes will have unequal spacing
the bright fringes will have unequal brightness
the fringes do not appear
The phenomenon of polarizaton shows that light has...... nature
dual
particle
transverse
longitudinal
If n is the orbit number of the electron in a hydrogen atom, the correct statement among the following is
electron energy varies as n2
electron energy increases as n increases
hydrogen emits infrared rays for the electron transition from n = ∞ to n = 1
electron energy is zero for n = 1
In a Ruby laser, the colour of laser light is due to ........ atom
chromium
oxygen
aluminium
xenon
In a radioactive decay, an element ZXA emits four α-parti cles, three β-particles and eight gamma photons. The atomic number and mass number of the resulting final nucleus are
Z − 8, A − 13
Z − 11, A − 16
Z − 5, A − 13
Z − 5, A − 16
The following truth table with A and B as inputs is for ....... gate
NOR
AND
OR
XOR
D.
XOR
For an XOR gate, output is high when odd number of inputs are high.
n photons of wavelength λ are absorbed by a black body of mass m. The momentum gained by the body is
A radioactive nucleus has specific binding energy E1. It emits an α-parti cle. The resulting nucleus has specific binding energy E2. Then
E2 = 0
E2 = E1
E2 < E1
E2 > E1