ه‍.ش. ۱۳۹۳ آذر ۴, سه‌شنبه

DVD solar spectroscope !

Espectroscopio casero

NASA - Tour of the Electromagnetic Spectrum

NASA - Tour of the Electromagnetic Spectrum

The Electromagnetic Spectrum Song - by Emerson & Wong Yann (Singapore)

The Electromagnetic Spectrum Song - by Emerson & Wong Yann (Singapore)

DX: MVP Series Optical Triple Triangular Glass Prism Spectrum