In a thin film of oil on water, if the thickness of the oil film is 0.5 μm and t
Practice Questions
Q1
In a thin film of oil on water, if the thickness of the oil film is 0.5 μm and the wavelength of light in air is 600 nm, what is the wavelength of light in the oil?
400 nm
500 nm
600 nm
700 nm
Questions & Step-by-Step Solutions
In a thin film of oil on water, if the thickness of the oil film is 0.5 μm and the wavelength of light in air is 600 nm, what is the wavelength of light in the oil?
Step 1: Understand that the wavelength of light changes when it enters a different medium, like oil.
Step 2: Know the formula to find the wavelength in a new medium: Wavelength in oil = Wavelength in air / Refractive index of oil.
Step 3: Identify the given values: Wavelength in air = 600 nm and the refractive index of oil (n) is assumed to be 1.5.
Step 4: Plug the values into the formula: Wavelength in oil = 600 nm / 1.5.
Step 5: Calculate the result: 600 nm divided by 1.5 equals 400 nm.
Step 6: Conclude that the wavelength of light in the oil is 400 nm.
