Explanation:
The magnetic susceptibility is negative for diamagnetic materials only.
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The bluish colour of water in deep sea is due to:
According to Bohr's theory the moment of momentum of an electron revolving in second orbit of hydrogen atom will be
|
(a) 2πh |
(b) πh |
(c) |
(d) |
In Young's experiment, the distance between the slits is reduced to half and the distance between the slit and screen is doubled, then the fringe width
|
(a) Will not change |
(b) Will become half |
|
(c) Will be doubled |
(d) Will become four times |
When a thin metal plate is placed in the path of one of the interfering beams of light
|
(a) Fringe width increases |
(b) Fringes disappear |
|
(c) Fringes become brighter |
(d) Fringes becomes blurred |
The number of electrons in 1.6 C charge will be
|
(a) |
(b) |
(c) 1.1 |
(d) 1.1 |
$\lambda\geq\lambda_0$
$\lambda\geq2\lambda_0$
$\lambda\leq\lambda_0$
$\lambda<\frac{\lambda_ 0}{2}.$
The energy of a hydrogen atom in its ground state is -13.6eV. The energy of the level corresponding to the quantum number n = 2 (first excited state) in the hydrogen atom is
|
(a) – 2.72 eV |
(b) – 0.85 eV |
(c) – 0.54 eV |
(d) – 3.4 eV |
