Gold nano particles are of following size (i) 25 nm, (ii) 50 nm, (iii) 75 nm and (iv) 100 nm. Arrange them in increasing order of wavelength absorption.
Question
Gold nano particles are of following size (i) 25 nm, (ii) 50 nm, (iii) 75 nm and (iv) 100 nm. Arrange them in increasing order of wavelength absorption.
Solution
The absorption wavelength of gold nanoparticles is inversely proportional to their size. This means that smaller particles absorb light with shorter wavelengths, while larger particles absorb light with longer wavelengths.
So, the arrangement in increasing order of wavelength absorption would be:
(i) 100 nm (ii) 75 nm (iii) 50 nm (iv) 25 nm
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