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प्रश्न
Why does the sky appear dark (or black) to an astronaut instead of blue?
उत्तर
The sky appears dark (or black) to an astronaut instead of blue because there is no atmosphere containing air molecules in outer space to scatter sunlight.
संबंधित प्रश्न
What is meant by scattering of light? Use this phenomenon to explain why the clear sky appears blue or the Sun appears reddish at sunrise.
Why does sun appear red at sunrise and sunset?
What is a rainbow? Draw a labelled diagram to show the formation of a rainbow.
Name a natural phenomenon which is caused by the dispersion of sunlight in the sky.
What is the order of colours in a rainbow, from the outside to the inside?
Which colour of the spectrum has
longest wavelength,
How many colours are there in a full spectrum of white light? Write the various colours of spectrum in the order, starting with red.
Which phenomenon makes us see the sun:
a few minutes before actual sunrise?
Which phenomenon makes us see the sun:
a few minutes after actual sunset?
Explain why, the sun can be seen about two minutes before actual sunrise. Draw a diagram to Illustrate your answer.
When sunlight enters the earth’s atmosphere, state which colour of light is scattered
- the most and
- which the least.
How would the sky appear when seen from the space (or moon)? Give reason for your answer.
What characteristic property of light is responsible for the blue colour of the sky?
In white light of sun, maximum scattering by the air molecular present in the earth’s atmosphere is for ______.
Explain in brief the reason for the following :
Advanced sunrise
Which phenomenon is responsible for making the path of light visible?
To an astronaut in a space-ship, the earth appears ______.
Blue litmus is added to two test tubes A and B containing dilute HCl and NaOH. Answer respectively. In which test tube a colour change will be observed? State the colour change and give its reason.
The clear sky appears blue because
How can we explain the reddish appearance of sun at sunrise or sunset? Why does it not appear red at noon?
