Why can you see an electric bulb at night when it is switched on?

Why can you see an electric bulb at night when it is switched on? of light which is demonstrated by the working of a pinhole camc gate device which can be used to see things on the other side of a high wall (x' a wall). ce between real images and virtual images. over {e differen 5tate . the image formed in a pinhole camera inverted ? whY the following blanks with suitable words : Fill in (a) Light travels (b) The formation of pinhole images and shadows are possible only (c) Light helps 0 J hich cannot be projected onto a screen is called . ..... . image. (d) The image w (e) A piece of glass is transparent but a piece of cardboard is ....„........ an electric bulb at night when it is switched on ?

Dear student,

When an electric bulb is switched on, the electricity is allowed to pass in its circuit and is converted into light energy.
Thus, a bulb glows when switched on and the eyes perceives the light energy in the visible spectra which is given out by the bulb.
Hence, the bulb becomes visible.

Regards

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