If we keep on diluting the potassium permanganate solution like this a number of times (5-7 times), we find that the colour of water is still coloured but becomes lighter and lighter. The colour of solution will become a bit lighter. (ii) Now, we take 10ml of deep purple solution of potassium permanganate in an another beaker and mix it with 90ml of water. Magnetic Effects of Electric Current / All about Electro-magnetism.
Human Eyes and Colorful World / Wonder of Light Part – I.Light – Reflection and Refraction / Wonder of Light Part-II.
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