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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
Refer to fig
(i) Name the lens L.
(ii) What are the points O, O' called?
(iii) Complete the diagram to form the image of the object AB.
(iv) Write three characteristics of the image.
Complete the ray diagram given below to show the nature of light produced on the screen.
The completed ray diagram is as shown below:
A wave has wavelength 50Å of name the wave.
Draw a labelled diagram: Dispersion of light through a prism.
A student has to trace the path of a ray of light through a glass prism. List four precautions he should observe for better results.
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Say TRUE or FALSE
Rainbow is formed by dispersion of which light by water drops
The phenomena of light involved in the formation of rainbow are ______.
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State True or False:
"Wavelength of red light is close to 700 nm.”
