Describe the Infra-red and Ultra-voilet rays?
Answer / amita sharma
Infra-red and Ultra-voilet rays:-These are type of invisible radiations. Radiation is energy propagating in the form of electromagnetic waves. Such waves do not require any material medium for their propagation. Infra-red are electromagnetic wave smaller in frequencies that the red ray of “visible” radiations. These are ordinary heat rays and are studied by bolo-meters. Ultraviolet radiations have frequencies greater than those of the violet rays of the “Visible” light. These marked by their heating as well as chemical effects and form producing fluorescence and phosphoresce. These are studied photographically.
Is This Answer Correct ? | 0 Yes | 0 No |
why is n-type conducter is neutral?
A man asks his friend to meet him at the airport at 3.00pm,to drive him to an appointment.he catches an earlier plane,and arrives at the airport at 2.00pm.he decides to start walking and is picked up en route by his friend.he arrives twenty minutes early for his appointment.how long did he walk?
what is the proper defination of 'LIGHT'
12 Answers College School Exams Tests, NPL,
What is the difference between Centigrade and Fahrenheit thermometers ?
An ice-box is built of wood 1.75 cm thick, lined with cork 3 cm thick. If in the steady state the temperature of the inner surface of the cork is 0 ºC and that of the outer surface of wood is 12 ºC, what is the temperature of the wood-cork interface? The thermal conductivities of wood and cork are 0.2 W/m-K and 0.04 W/m-K respectively
What is the general term for the kind of material usually placed between the conducting plates of a capacitor?
By which formula, the values in one thermometer can be converted into that of another thermometer ?
In any current connection there are two wires one is phase and another is neutral, what is the use of neutral wire?
What is radium used for?
Why is flywheel used in motor cars ?
i measured a 3-ph capacitor with a multimeter which is not connected to supply... but i could get the phase to phase voltage... how tis is possible..????
sound frequencies below 16 hertz are usually referred to by scientists as: