Answer
Verified
459.6k+ views
Hint - In order to solve this problem obtain the formula in which b is included and you know the unit of all other variables then get the value of b and get the unit of b. doing this will solve your problem and will give you the right answer.
Complete step-by-step answer:
\[\lambda \propto \dfrac{1}{T}\]
\[ \Rightarrow \lambda = \dfrac{b}{T}\] , where b is Wien’s constant of proportionality.
Wien's constant is a physical constant that determines the relationship between the thermodynamic temperature of a black body (an object that radiates electromagnetic energy perfectly) and the frequency at which the radiation intensity becomes maximum.
I.e. \[ \Rightarrow \lambda = \dfrac{b}{T}\] where b is constant of proportionality.
Using the dimensional continuity rule, the usage on L.H.S. will be equal to the value on R.H.S.
I.e. LHS=\[\lambda \] since S.I. unit of \[\lambda \] is m. therefore, its dimension is \[\left[ {{M^0}{L^1}{T^0}} \right]\]
On RHS we have \[\dfrac{b}{T}\] where S.I. unit is K therefore dimensions of T is \[{K^{ - 1}}\]
Because it is a statute, the proportions of L.H.S. will be equal to R.H.S.
i.e. \[\left[ {{M^0}{L^1}{T^0}} \right] = b\left[ {{K^{ - 1}}} \right]\]
\[ \Rightarrow b = \dfrac{{\left[ {{M^0}{L^1}{T^0}} \right]}}{{\left[ {{K^{ - 1}}} \right]}}\]
\[ \Rightarrow b = \left[ {{M^0}{T^0}{L^1}K} \right]\]
Since the dimension of b is \[\left[ {{M^0}{T^0}{L^1}K} \right]\]. The S.I., then. The Wien constant unit is m. K., where m is S.I. The length unit and the K is the S.I. The temperature unit.
Hence, the correct option is D.
Note – In such types of questions of finding units we can simply apply the basic principle of Dimensional analysis, according to which for an equation to be valid it should follow dimensional consistency,i.e. the units on L.H.S. should be equal to the units on R.H.S.
Complete step-by-step answer:
\[\lambda \propto \dfrac{1}{T}\]
\[ \Rightarrow \lambda = \dfrac{b}{T}\] , where b is Wien’s constant of proportionality.
Wien's constant is a physical constant that determines the relationship between the thermodynamic temperature of a black body (an object that radiates electromagnetic energy perfectly) and the frequency at which the radiation intensity becomes maximum.
I.e. \[ \Rightarrow \lambda = \dfrac{b}{T}\] where b is constant of proportionality.
Using the dimensional continuity rule, the usage on L.H.S. will be equal to the value on R.H.S.
I.e. LHS=\[\lambda \] since S.I. unit of \[\lambda \] is m. therefore, its dimension is \[\left[ {{M^0}{L^1}{T^0}} \right]\]
On RHS we have \[\dfrac{b}{T}\] where S.I. unit is K therefore dimensions of T is \[{K^{ - 1}}\]
Because it is a statute, the proportions of L.H.S. will be equal to R.H.S.
i.e. \[\left[ {{M^0}{L^1}{T^0}} \right] = b\left[ {{K^{ - 1}}} \right]\]
\[ \Rightarrow b = \dfrac{{\left[ {{M^0}{L^1}{T^0}} \right]}}{{\left[ {{K^{ - 1}}} \right]}}\]
\[ \Rightarrow b = \left[ {{M^0}{T^0}{L^1}K} \right]\]
Since the dimension of b is \[\left[ {{M^0}{T^0}{L^1}K} \right]\]. The S.I., then. The Wien constant unit is m. K., where m is S.I. The length unit and the K is the S.I. The temperature unit.
Hence, the correct option is D.
Note – In such types of questions of finding units we can simply apply the basic principle of Dimensional analysis, according to which for an equation to be valid it should follow dimensional consistency,i.e. the units on L.H.S. should be equal to the units on R.H.S.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Which are the Top 10 Largest Countries of the World?
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Difference Between Plant Cell and Animal Cell
Give 10 examples for herbs , shrubs , climbers , creepers
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
Write a letter to the principal requesting him to grant class 10 english CBSE
Change the following sentences into negative and interrogative class 10 english CBSE