Question

Choose the correct order of decreasing order of sizes among the following
Thickness of paper > Size of RBC > Length of a typical virus > Size of proton
Thickness of paper > Size of proton > Length of a typical virus > Size of RBC
Size of Proton > Length of typical virus > Size of RBC > Thickness of paper
Size of RBC > Length of typical virus > Size of proton > Thickness of paper​

Answer 1

The correct option is, Thickness of paper > Size of RBC > Length of a typical virus > Size of proton.

What is Thickness of paper?

• Paper thickness range from the thinnest 0.02 mm papers up to around very thick 1.20 mm cardstock.
• Common office paper ranges from 0.05 mm to 0.10 mm in thickness.
• We can use specialized precision tools, like micrometers and calipers, to easily measure how thick a piece of paper is.

What is Size of RBC?

• Normal human RBCs have a biconcave shape, their diameter is about 7-8 µm, and their thickness is about 2.5 µm [11,12,34].
• The real part of the refractive index of erythrocytes at 633 nm is about 1.40-1.42, which is mainly caused by the combined refractive indices of oxygenated hemoglobin (1.615) and water (1.333) [35].

What is Length of a typical virus?

• Most viruses are in the range of 20–200 nm, although some viruses can exceed 1000 nm in length.
• A typical bacterium is 2–3 μM in length, a typical eukaryotic cell is 10–30 μM in diameter.

What is Size of proton?

• The team measured a proton radius of 0.84184 femtometres3.
• Randolf Pohl, who led that muonic hydrogen measurement and is now at the Johannes Gutenberg University in Mainz, Germany, has collaborated on other muonic experiments that have confirmed this value.

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