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प्रश्न
When we place a glass prism in the path of a narrow beam of white light a spectrum is obtained. What happens when a second identical prism is placed in an inverted position with respect to the first prism? Draw a labelled ray diagram to illustrate it.
उत्तर
The first prism disperses white light into its seven constituent colours and forms the spectrum. The other inverted prism recombines all the seven colors and gives a white light.
संबंधित प्रश्न
Fill in the blank with suitable word:
When a ray of light enters a prism, it bends ................ the normal ; as it leaves the prism, it bends ................. the normal.
In the figure given alongside, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a spectrum YX on the screen.
State the colour seen (i) at X, and (ii) at Y.
A beam of white light falls on a glass prism. The colour of light which undergoes the least bending on passing through the glass prism is:
(a) violet
(b) red
(c) green
(d) blue
The colour of white light which is deviated the maximum on passing through the glass prism is:
(a) blue
(b) indigo
(c) red
(d) orange
Which of the following colour of white light has the least wavelength?
(a) red
(b) orange
(c) violet
(d) blue
A glass prism is able to produce the spectrum when white light passes through it, but a glass slab doesn’t produce any spectrum. Explain why it is so.
A wave has wavelength 50Å of State its one use.
The phenomena of light involved in the formation of rainbow are ______.
Why do we see a rainbow in the sky only after rainfall?
Which one of the following is involved for the formation of rainbow in the sky?
