(a)Name the element used to make filament of electric bulb
(b)What is real image.
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a) tungsten .
b) the object which can be obtained on the screen is called real image.
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a) Tungsten is usually used for making filament because of high melting points and emits light on becoming hot.
b) The image that is formed by actual intersection of 2 or more light rays is called real images. These can be obtained on a screen..
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