Match List I Items with List II Unit of length and select the correct answer by using the codes give...........

General Science (Easy) Physics

Match List I (Items) with List II (Unit of length) and select the correct answer by using the codes given below the lists.

List I (Items)	List II (Units of length)
A. Distance between earth and stars	1 Microns
B. Interatomic distances in a solid	2 Angstroms
C. Size of the nucleus	3 Light years
D. Wavelength of infrared laser	4 Fermi 5 kilometres

A B C D

5 4 2 1

3 2 4 1

5 2 4 3

3 4 1 2

Let's match the items with the correct units and explain:

- A. Distance between earth and stars: Measured in light years (Option 3); stars are far away, requiring units like light-years.

- B. Interatomic distances in a solid: Measured in angstroms (Option 2); atoms are spaced about a few angstroms apart.

- C. Size of the nucleus: Measured in fermi (Option 4); nucleus sizes are in the range of femtometers (also called fermi).

- D. Wavelength of infrared laser: Measured in microns (Option 1); infrared wavelengths are about micrometers (microns).

Now, let's see all the options:

- Option 1: 5 4 2 1

- Option 2: 3 2 4 1

- Option 3: 5 2 4 3

- Option 4: 3 4 1 2

So, the correct answer is:

- A – 3 (Light year)

- B – 2 (Angstrom)

- C – 4 (Fermi)

- D – 1 (Microns)

Option 4: 3 4 1 2 is the correct match.

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