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प्रश्न
State True or False:
"Wavelength of red light is close to 700 nm.”
विकल्प
True
False
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उत्तर
This statement is True.
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.
Draw a ray diagram to explain the term angle of deviation.
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 acts as tiny prisms in the formation of a rainbow?
A beam of white light is shone onto a glass prism. The light cannot be:
(a) deviated
(b) dispersed
(c) focused
(d) refracted
Which of the following colour of white light is least deviated by the prism?
(a) green
(b) violet
(c) indigo
(d) yellow
The coloured light having the maximum speed in glass prism is:
(a) blue
(b) green
(c) violet
(d) yellow
The seven colours in the spectrum of sunlight in order, are represented as :
How does the speed of light determine the optical density of a medium?
Define the term dispersion of light.
Make the correct choice for each of the following:
Which one of the following Fig correctly shows the path of the ray through the glass block?
A wave has wavelength 50Å of State the speed in vacuum.
What is the cause of the dispersion of white light through a glass prism? Draw a ray diagram to show the path of light when two identical glass prisms are arranged together in an inverted position with respect to each other and a narrow beam of white light is allowed to fall obliquely on one of the faces of the prisms.
Sunlight entering through a narrow aperture falls on a prism. Draw a neat labelled ray diagram to show the formation of the spectrum on a screen. Name the colour obtained nearer the base of the prism.
The sunlight can be split into its constituent colors using ______.
What is dispersion? Explain in detail.
State the correct sequence (1-7) of colours in the spectrum formed by the prisms A and B, shown in the following figure.
In the following diagram showing dispersion of white light by a glass prism, the colours 'P' and 'Q’ respectively are:
