Advertisements
Advertisements
प्रश्न
State two uses of ultraviolet radiation.
Advertisements
उत्तर
(i) In producing vitamin D in plants.
(ii) For sterilizing purposes.
संबंधित प्रश्न
A narrow beam PQ of white light is passing through a glass prism ABC as shown in the diagram.
Trace it on your answer sheet and show the path of the emergent beam as observed on the screen DE.
(i) Write the name and cause of the phenomenon observed.
(ii) Where else in nature is this phenomenon observed?
(iii) Based on this observation, state the conclusion which can be drawn about the constituents of white light.
A beam of white light falls on a glass prism. The colour of light which undergoes the least bending on passing through the glass prism is:
(a) violet
(b) red
(c) green
(d) blue
Which of the following colour of white light is least deviated by the prism?
(a) green
(b) violet
(c) indigo
(d) yellow
When white light passes through a prism, it ............
What conclusion do you draw about the nature of white light in part (b)?
Make the correct choice for each of the following:
Which one of the following Fig correctly shows the path of the ray through the glass block?
Draw a neat and labelled diagram for dispersion of light.
When white light enters a glass prism from the air, the angle of deviation is least for ____________.
Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?
