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Characteristics of Bohr's Atomic Model

In calculatin...

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In calculating the number of spectral lines when to apply these two formulas- 1. (n2-n1)(n2-n1+1)/2 2. (n2-n1)

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Q. How many spectral lines are seen for hydrogen atom when electron jump from

n_{2} = 5

n_{1} = 1

in visible region?

(l_{1}, m_{1}, n_{1})

(l_{2}, m_{2}, n_{2})

are d.c's two lines. Then
The lines are perpendicular if

l_{1} l_{2} + m_{1} m_{2} + n_{1} n_{2} = 0

Q. In a thick glass slab of thickness

l

, and refractive index

n_{1}

, a cuboidal cavity of thickness ‘m’ is carved as shown in the figure and is filled with a liquid of refractive index

n_{2} (n_{1} > n_{2})

\frac{l}{m}

, so that shift produced by this slab is zero when an observer

A

observes an object

B

with paraxial rays is

Q. If two lines have direction cosines

l_{1}, m_{1}, n_{1}

l_{2}, m_{2}, n_{2}

then the condition for these lines being parallel to each other would be -

Q. For the Paschen series the values of

n_{1}

n_{2}

in the expression

△ E = R_{H} \times c [\frac{1}{n_{1}^{2}} - \frac{1}{n_{2}^{2}}]

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