index number for the base year is always considered as
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Step-by-step explanation:
ANSWER
Einstein’s photoelectric equation,
K
max
=hν−ϕ
0
where
K
max
is the max kinetic energy of emitted electrons and ϕ
0
is the work function.
According to Planck’s quantum theory, light radiations consist of small packets of energy. Einstein postulated that a photon of energy hv is absorbed by the electron of the metal surface, then the energy is used to liberate electron from the surface and rest of the energy becomes the kinetic energy of the electron.
Energy of photon is,
E=hv
Where, h = Planck’s constant
v = frequency of light
The minimum energy required by the electron of a material to escape out of it, is work function.
The additional energy acquired by the electron appears as the maximum kinetic energy ‘Kmax’ of the electron.
Einstein's photoelectric equation
K
max
=eV
o
Salient features observed in photoelectric effect: —
The stopping potential and hence the maximum kinetic energy of emitted electrons varies linearly with the frequency of incident radiation.
There exists a minimum cut - off frequency , for which the stopping potential is zero.
Photoelectric emission is instantaneous.
Answer:
An index number which accounts for the relative importance of the items is known as weighted index
An index number in which different items of the series are accorded weight age according to their relative importance is known as Weighted Index Numbers. It is the weighted average of the prices of different goods.
Price Index
1. Price Index Number is calculated by two methods, namely
b. Simple Average of Price Relative Method
2. Price Index number is also known as Unweighted Index Number
3. Price Index Number takes into account the prices of the commodity of the base year as well as of the current year
Step-by-step explanation:
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