Express 1 light year in terms of metre. What is its order of magnitude?

Express light year in terms of metres.

Express 1 parsec in terms of meters . What its order of magnitude .

Express 1 micron in metre.

Light emitted by Krypton 86 is 6057.8021 Å. Calculate number of wavelengths of Krypton 86 in one metre. What is the order of magnitude ?

How many parsec make up 1 metre ? What is the order of magnitude?

Express nanometre in terms of metre and angstrom units.

What is one astronomical unit ? Express it in metres . Write its order og magnitude .

Express one parsec in terms of light year.

What is light year?

What is 1 Light year?