Advertisements
Advertisements
प्रश्न
Draw a labelled diagram: Dispersion of light through a prism.
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
A narrow beam PQ of white light is passing through a glass prism ABC as shown in the diagram.
Trace it on your answer sheet and show the path of the emergent beam as observed on the screen DE.
(i) Write the name and cause of the phenomenon observed.
(ii) Where else in nature is this phenomenon observed?
(iii) Based on this observation, state the conclusion which can be drawn about the constituents of white light.
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.
What is spectrum? What is the name of glass shape used to produce a spectrum?
Describe how you could demonstrate that white light is composed of a number of colours.
What is a rainbow? What are the two conditions necessary for the formation of a rainbow in the sky?
Which of the following coloured light has the least speed in glass prism?
(a) violet
(b) yellow
(c) red
(d) green
The seven colours in the spectrum of sunlight in order, are represented as :
Explain briefly, with the help of a neat labelled diagram, how white light gets dispersed by a prism. On which surface of a prism, there is both dispersion and deviation of light, and on which surface of the prism, there is only deviation of light ?
In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is ______.
Refer to fig
(i) Name the lens L.
(ii) What are the points O, O' called?
(iii) Complete the diagram to form the image of the object AB.
(iv) Write three characteristics of the image.
Answer the following:
What do you mean by dispersion? Name the different colours of light in the proper sequence in the spectrum of light.
Differentiate between a glass slab and a glass prism.
State two properties of ultra-violet radiations which differ from visible light.
State two uses of ultraviolet radiation.
Write the range of wavelength of the ultraviolet spectrum.
Suggest one way, in each case, by which we can detect the presence of Infrared radiations.
Observe the given figure and answer the following questions.
- Which colour light rays bend most?
- Which colour light rays bend least.
- What is the wavelength of violet light rays?
Say TRUE or FALSE
Rainbow is formed by dispersion of which light by water drops
The splitting of white light into its component colours is called ____________.
State the colour which bends:
- The most.
- The least while passing through a glass prism.
