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Question no. 2The wavelength of light in a medium is lamda=lamdaknot/mu where lamda is the wavelength in vacuum .a beam of red light (lamda=720nm) enters into water .the wavelenght in water is lamda =lamdaknot/mu =540nm.to a person in water does this light appear green

Question no. 2The wavelength of light in a medium is lamda=lamdaknot/mu where lamda is the wavelength in vacuum .a beam of red light (lamda=720nm) enters into water .the wavelenght in water is lamda =lamdaknot/mu =540nm.to a person in water does this light appear green

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Grade:12

1 Answers

Vikas TU
14149 Points
3 years ago
For first medium,
Wavelength = X
Frequency =f
Velocity = V
For second medium,
Wavelength =?
Frequency = f ( Remains same for all mediums)
Velocity = 3m/s
Now, formula connecting these three quantities is,
Velocity =Wavelength * Frequency
For first medium,
V=X*f ________________(i)
For second medium,
3=Wavelength*f ________(ii)
From equation (i) take the value of f in terms of V and X and put it into (ii)
3= Wavelength*V/X
Wavelength= 3X/V

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