Structure of Atom

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A rainbow shows seven colours: violet, indigo, blue, green, yellow, orange, and red. These colours form a continuous visible spectrum, with red having higher wavelength and violet having shorter wavel…

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The speed of light is c = 3×10^8 m/s. Visible light is an electromagnetic wave, and this speed is used in the relation c = νλ.

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They are related by c = νλ. Since c is constant, wavelength decreases when frequency increases, and wavelength increases when frequency decreases.

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Using c = νλ, ν = c/λ = (3×10^8 m/s)/(1.0 m) = 3×10^8 s^-1. So the frequency is 3×10^8 Hz.

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A vibrating electric charge creates a changing electric field, which creates a changing magnetic field. The electric and magnetic fields are perpendicular to each other and to the direction of wave tr…

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Spectrum is a group of wavelengths. In visible light, the spectrum includes the colours seen in a rainbow.

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Each element emits its own characteristic colour when heated. These colours correspond to certain discrete wavelengths and form line spectra, which can be used to identify unknown atoms like fingerpri…

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Cupric chloride produces a green colour flame, while strontium chloride produces a crimson red flame.