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A very thin oil film (n = 1.25) floats on water (n = 1.33).

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A very thin oil film (n = 1.25) floats on water (n = 1.33). What is the thinnest film that produces a strong reflection for green light with a wavelength of 500 nm?

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Customer: replied 5 years ago.
Thank you so much, can you answer my other questions?
You are most welcome..I will take a look

Customer: replied 5 years ago.
Hey Sandhya,

Can you help me with this one?

A 1.0 cm object is 60 cm in front of a diverging lens that has a -30 cm focal length. Find the image position and height. Is the image real or virtual? Is the image upright or inverted?
Sorry, I can't help in this.

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