Advertisements
Advertisements
प्रश्न
State two properties of ultra-violet radiations which differ from visible light.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Why do the component colours of incident white light split into a spectrum while passing through a glass prism, explain
(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?
Name the process which is involved in the formation of a rainbow.
State the speed of light in (a) air, (b) water, and (c) glass
An object is placed in front of a converging lens and in front of a diverging lens as in fig.
(a)Complete the ray diagram to obtain an image.
(b)Compare the nature of image formed by both the lenses in the above case.
Differentiate between a glass slab and a glass prism.
Why do we see a rainbow in the sky only after rainfall?
State the correct sequence (1-7) of colours in the spectrum formed by the prisms A and B, shown in the following figure.
The periscope is an optical device with a polished surface that reflects the light falling on it.
A prism of refractive index `sqrt2` and refracting angle A produces minimum deviation δm of a ray on one face at an angle of incidence 45°, The values of A and δm are, respectively ______.
