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Q. What are uses of ultra-violet radiations?
Uses of ultra-violet radiations:
(i) They are utilized to destroy the bacteria and for sterilizing surgical instruments.
(ii) These radiations are utilized in detection of forged documents, finger prints in forensic laboratories.
(iii) They are utilized to preserve the food items.
(iv) They assist to find the structure of atoms.
A ROCKETSHIP IN FREE SPACE MOVES WITH CONSTANT ACCELERATION OF 9.8 METER PER SECOND SQUARE. IF IT STARTS FROM REST HOW LONG IT WILL TAKE TO ACQUIRE A SPEED ONE-TENTH THAT OF LIGHT
working principle of a prism
Q Calculate the longest wavelength that can be analysed by a rock salt crystal of spacing d = 2.82 Ao in the first order. Data: d = 2.82 Å = 2.82 × 10-10 m; n = 1 ; λmax = ?
Stretch the fore-finger, central finger and thumb left hand mutually perpendicular. Then if the fore-finger shows in the direction of field and the central in the direction of cu
Q. Write any three medical applications of laser. Medical applications (i) In medicine micro surgery has befall possible due to narrow angular spread of the laser beam.
Q. What are uses of ultra-violet radiations? Uses of ultra-violet radiations: (i) They are utilized to destroy the bacteria and for sterilizing surgical instruments.
In a Newton's rings experiment in laboratory source of light having two wavelengths 6000Å and 4500Å is used. It is found that n th dark ring due to 6000Å coincides with
Two cars head out in the similar direction. Car A starts 1.0 min before car B. The position-time graphs for both cars are shown in the accompanying figure. a. How far apa
Q. Why does sun seems flat during sunrise and sunset? Answer:- The sun rays have to move through a larger atmospheric distance. The majority of the blue light and shorter
What is a linear charge density? Answer: Note that the respond In the case of a distribution of charge in which all the charge is on a line it is the total amount of char
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