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प्रश्न
State the correct sequence (1-7) of colours in the spectrum formed by the prisms A and B, shown in the following figure.

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उत्तर
In figure A and figure B
| Figure A | Colour | Figure B |
| 1 | Red | 7 |
| 2 | Orange | 6 |
| 3 | Yellow | 5 |
| 4 | Green | 4 |
| 5 | Blue | 3 |
| 6 | Indigo | 2 |
| 7 | Violet | 1 |
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संबंधित प्रश्न
In the following diagram the correctly marked angles are :

(a) ∠A and ∠e
(b) ∠i, ∠A and ∠D
(c) ∠A ∠r and ∠e
(b) ∠A ∠r and ∠D
Which is optically denser: water or air? Give reason
Complete the ray diagram given below to show the nature of light produced on the screen.

While performing the experiment to trace the path of a ray of light passing through a glass prism, four students marked the incident ray and the emergent ray in their diagrams in the manner shown below. 
(A) I
(B) II
(C) III
(D) IV
If white light is used in same way what change is expected in the emergent beam?
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?
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.
Say TRUE or FALSE
Rainbow is formed by dispersion of which light by water drops
What is Newton’s disc?
Assertion: We can see the rainbow in the sky when the rain starts falling after a spell of bright sunlight.
Reason: The rainbow is formed due to the dispersion of light.
