An incandescent filament emits a spectrum which is :

line spectrum

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band spectrum

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continuous spectrum

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characteristic spectrum

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Solution

The correct option is C continuous spectrum
An electric bulb, a candle or a red hot iron piece emits light, which has continuously varying wavelengths.
So it shows continuous emission spectrum.

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Tungsten is used almost exclusively for filament of incandescent lamps because tungsten has a high melting point ( $3380^{\circ}$ C) and becomes incandescent (i.e., emits light at a high temperature) at 2400 K.

State true or false.
Tungsten is used almost exclusively for filament of incandescent lamps because tungsten has a high melting point ( $3380^{\circ}$ C) and becomes incandescent (i.e., emits light at a high temperature) at $2400 K$ .

Q. An incandescent bulb has a thin filament of tungsten that is heated to high temperature by passing an electric current. The hot filament emits black-body radiation. The filament is observed to break up at random locations after a sufficiently long time of operation due to non-uniform evaporation of tungsten from the filament. If the bulb is powered at constant voltage, which of the following statement(s) is(are) true?

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An incandescent filament emits a spectrum which is :

The correct option is C continuous spectrumAn electric bulb, a candle or a red hot iron piece emits light, which has continuously varying wavelengths. So it shows continuous emission spectrum.

The correct option is C continuous spectrum
An electric bulb, a candle or a red hot iron piece emits light, which has continuously varying wavelengths.
So it shows continuous emission spectrum.