Relative Size Of Electro-Magnetic Spectrum

[Kehsibashok]

I Watched A Video . In Which , It's Mentioned That The

Relative Size Of..

Gamma Rays - Atomic Nucleus
X-Rays - Atom
Ultra-Violet Rays - DNA
Visible Light - Bacteria
...
Radio Waves - Mountain Ranges

What's Mean By Relative Size ? I'm Confused a lot !

Thanks a lot In Advance For You Help

 

[hilbert2]

It simply means that e.g. the wavelength of gamma rays is similar to the typical radius of atomic nuclei.

 

[Kehsibashok]

Thanks a lot

It simply means that e.g. the wavelength of gamma rays is similar to the typical radius of atomic nuclei.

Thanks a lot For Your Help :)

I Have Another Doubt . Does It Mean The Radius or Diameter ? Because Wavelength Of Gamma Rays is 10(power -15) which is the diameter of nucleus .so you're referring to diameter ... (right?)

 

[jtbell]

When we make crude comparisons like this, we usually don't try to be more exact than the nearest power (exponent) of 10, in which case a factor of 2 or 1/2 is not significant.

 

[mfb]

Gamma rays have a broad spectrum, with roughly 10^-15m as maximal wavelength and without a minimal wavelength - and the first border is not very strict, different scientists use different values.

Nuclei have different radii, too - an uranium nucleus (92 protons and ~145 neutrons) is larger than a hydrogen nucleus (a single proton).