Burning Beams?

Question

Are there radio frequencies in the triangular burning beam of a magnifying glass.

Answer 1

I think you are asking if the magnifying glass is concentrating radio waves the same as the visible light right?  In that case, the answer is no.  Radio waves are emitted by the sun, not in large quantity since it is so hot and the blackbody radiation curve doesn't have a lot of energy at radio frequencies, but they are there.  Furthermore, radio waves can be "concentrated" like you focus the visible light with a magnifying glass or with a mirror such as in a telescope.  However, since the wavelength of radio waves is so large, you need a huge lens or mirror to do this.  This is why radio telescopes such as the one at Arecibo have enormous dishes (the dish is the mirror).  They are focusing radio waves, but the surface needs to be huge because the wavelength of radio waves is large.

Answer 2

No. The triangular burning beam of a magnifying glass is a light ray and has a frequency of 10^14Hz and a wavelength of 10^-6 m. Wheareas a radiofrequency is of 10^4 Hz and has a wavelength of 10^4 m. Considering on earth yes there maybe radio frequency present but it is generated on earth. It is not coming from the sun.

Answer 3

Probably, but only because there are radio beams *everywhere* on earth.