Advertisements
Advertisements
प्रश्न
In figure AO is the ray of white light falling on a prism PQR. Complete the diagram till the light emerges out from the prism and falls on the screen.
Advertisements
उत्तर
Diagram is completed:
‘The white light splits up into seven colours which are seen on the screen and arrangement of colours from bottom to top is given by the word ‘VIBGYOR’.
APPEARS IN
संबंधित प्रश्न
Draw a ray diagram to show the dispersion of white light.
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
- at X, and
- at Y.
- Why do different colours of white light bend through different angles with respect to the incident beam of light?
Which of the following colour of white light has the least wavelength?
(a) red
(b) orange
(c) violet
(d) blue
Draw a labelled diagram: Dispersion of light through a prism.
Observe the given figure and write appropriate phenomenon of light in the box.
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.
The dispersive powers of flint glass and crown glass are 0.053 and 0.034, respectively and their mean refractive indices are 1.68 and 1.53 for white light. Calculate the angle of the flint glass prism required to form an achromatic combination with a crown glass prism of refracting angle 4°:
dispersive power of crown glass? Given that µv = 1.5230, µr = 1.5145
Observe the given diagram and answer the questions:
- Name the process shown in the figure.
- Name the colour that deviates the most.
- Name the colour that deviates the least.
- Name any one phenomenon in nature which is based on the above process.
- Define ‘spectrum’.
Make a rainbow
Try to make your own rainbow. You can try this project in the morning or in the evening. Stand with your back towards the Sun. Take a hosepipe or a water pipe used in the garden. Make a fine spray in front of you. You can see different colours of rainbow in the spray.
