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प्रश्न
State two properties of ultra-violet radiations which differ from visible light.
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उत्तर
(i) Ultra-violet radiations are of wavelength shorter than that of visible light.
(ii) Ultra-violet radiations are more chemically active than the visible light.
संबंधित प्रश्न
(i) A ray of white light breaks up into its components while passing through a glass prism. Draw a ray diagram to show the path of rays.
(ii) Mark the least deviated colour in your diagram
(iii) Why do different coloured rays deviate differently in a prism?
What happens when a ray of ordinary light is passed through a triangular glass prism?
Which of the following coloured light has the least speed in glass prism?
(a) violet
(b) yellow
(c) red
(d) green
The splitting of white light into its constituent colours is called .............
A ray of white light falls on a prism. Draw a ray diagram to show that the prism disperses the white light.
The phenomenon of splitting of light into its component colours is ___________ .
Which characteristic property of light is responsible for the blue colour of the sky?
Observe the given figure and write appropriate phenomenon of light in the box.
Name the scientist who was the first to use a glass prism to obtain the spectrum of sunlight.
The angle of deviation through a prism is minimum when
- Incident rays and emergent rays are symmetric to the prism.
- The refracted ray inside the prism becomes parallel to its base.
- The angle of incidence is equal to that of the angle of emergence.
- When the angle of emergence has doubled the angle of incidence.
Choose the correct answer from the options given below:
