関連ワード:  what is light in physics class 10    what is light definition in physics class 10    what is reflection of light in physics class 10    what is scattering of light in physics class 10    what is dispersion of light in physics class 10    what is refraction of light in physics class 10    what is nature of light in physics class 10    what is spectrum of light in physics class 10    what is beam of light in physics class 10    what is wavelength of light in physics class 10