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Payal Priya
Birsa Institute of Technology (BIT), Sindri
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## < 11 Other formulas that you can solve using the same Inputs

Diagonal of the parallelogram when sides and cosine β are given
Diagonal 1=sqrt((Side A)^2+(Side B)^2-2*Side A*Side B*cos(Theta)) GO
Diagonal of the parallelogram when sides and cosine β are given
Diagonal 2=sqrt((Side A)^2+(Side B)^2+2*Side A*Side B*cos(Theta)) GO
The radius of the circumscribed circle in terms of cosine of the angle that adjacent to the diagonal and the adjacent side of
Diagonal of a parallelogram when the area, diagonal, and angles between diagonals are given
Diagonal A=(2*Area)/(Diagonal B*sin(Theta)) GO
Angle between the rectangle diagonals when angle between the diagonal and rectangle side is given
Angle Between Two Diagonals=2*Theta GO
Area of rectangle in terms of sine of the acute angle between the diagonals and the diagonal of a rectangle
Area=((Diagonal)^2*sin(Theta))/2 GO
Breadth of rectangle when diagonal and angle between diagonals are given
Rectangle diagonal in terms of cosine of the angle that adjacent to the diagonal and the adjacent side of the angle
Rectangle diagonal in terms of sine of the angle
Diagonal=Length/sin(Theta) GO
Side of the parallelogram when the height and sine of an angle are given
Side A=Height/sin(Theta) GO
Side of the parallelogram when the height and sine of an angle are given
Side B=Height/sin(Theta) GO

## < 7 Other formulas that calculate the same Output

Interference of waves of two intensities
Resultant Intensity=Intensity 1+Intensity 2+(2*sqrt(Intensity 1*Intensity 2)*cos(Phase Difference)) GO
Resultant intensity on-screen of YDSE when intensities are different
Resultant Intensity=Intensity 1+Intensity 2+2*sqrt(Intensity 1*Intensity 2)*cos(Phase Difference) GO
Resultant intensity on-screen of Young's double-slit experiment
Resultant Intensity=4*Intensity 1*(cos(Phase Difference/2))^2 GO
Intensity of constructive interference
Resultant Intensity=(sqrt(Intensity 1)+sqrt(Intensity 2))^2 GO
Intensity of destructive interference
Resultant Intensity=(sqrt(Intensity 1)-sqrt(Intensity 2))^2 GO
Resultant intensity of coherent sources
Resultant Intensity=Intensity 1+Intensity 2 GO
Intensity Of Sound
Resultant Intensity=Power*Area GO

### Malus’ law Formula

Resultant Intensity=Intensity 1*(cos(Theta))^2
More formulas
Pressure when force and area are given GO
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Focal length of Concave mirror GO
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Newton's law of cooling GO
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Velocity OF A Progressive Wave(Using Frequency) GO
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Frequency Of Wavelength ( Using Velocity ) GO
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Effective Wavelength When Source Moves Away From the Observer GO
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Observed Frequency When Source Moves Away From the Observer GO
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Observed Frequency When Source Moves Towards The Observer And The Observer Moves Away GO
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Observed Frequency When Observer and Source Move Away From Each other GO
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## What is Malus' law ?

Malus' law is crucial if we want to learn or understand the polarization properties of light. The law helps us to study the light intensity relation of the polarizer-analyzer. Malus law is named after Étienne-Louis Malus, who in the year 1808 discovered that natural incident light could be polarized when it was reflected by a glass surface. He used calcite crystal for his experiment.

## How to Calculate Malus’ law?

Malus’ law calculator uses Resultant Intensity=Intensity 1*(cos(Theta))^2 to calculate the Resultant Intensity, Malus’ law states that the intensity of plane-polarized light that passes through an analyzer varies as the square of the cosine of the angle between the plane of the polarizer and the transmission axes of the analyzer. Resultant Intensity and is denoted by I symbol.

How to calculate Malus’ law using this online calculator? To use this online calculator for Malus’ law, enter Theta (ϑ) and Intensity 1 (I1) and hit the calculate button. Here is how the Malus’ law calculation can be explained with given input values -> 6.75 = 9*(cos(30))^2.

### FAQ

What is Malus’ law?
Malus’ law states that the intensity of plane-polarized light that passes through an analyzer varies as the square of the cosine of the angle between the plane of the polarizer and the transmission axes of the analyzer and is represented as I=I1*(cos(ϑ))^2 or Resultant Intensity=Intensity 1*(cos(Theta))^2. Theta is an angle that can be defined as the figure formed by two rays meeting at a common endpoint and Intensity 1 is the quantity of energy the wave conveys per unit time across a surface of unit area, and it is also equivalent to the energy density multiplied by the wave speed.
How to calculate Malus’ law?
Malus’ law states that the intensity of plane-polarized light that passes through an analyzer varies as the square of the cosine of the angle between the plane of the polarizer and the transmission axes of the analyzer is calculated using Resultant Intensity=Intensity 1*(cos(Theta))^2. To calculate Malus’ law, you need Theta (ϑ) and Intensity 1 (I1). With our tool, you need to enter the respective value for Theta and Intensity 1 and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Resultant Intensity?
In this formula, Resultant Intensity uses Theta and Intensity 1. We can use 7 other way(s) to calculate the same, which is/are as follows -
• Resultant Intensity=Intensity 1+Intensity 2+(2*sqrt(Intensity 1*Intensity 2)*cos(Phase Difference))
• Resultant Intensity=(sqrt(Intensity 1)+sqrt(Intensity 2))^2
• Resultant Intensity=(sqrt(Intensity 1)-sqrt(Intensity 2))^2
• Resultant Intensity=Intensity 1+Intensity 2
• Resultant Intensity=4*Intensity 1*(cos(Phase Difference/2))^2
• Resultant Intensity=Intensity 1+Intensity 2+2*sqrt(Intensity 1*Intensity 2)*cos(Phase Difference)
• Resultant Intensity=Power*Area
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