How was the work done in the space shuttle Columbia helpful in the treatment of cancer?
Invisibility cloak S.S. Verma We are fascinated when have an opportunity to read in books or see in sci-fiction movies about a character that can make himself invisible or undetectable to common people and work for the benefit of mankind. Scientists and engineers are working to explore the optics of invisibility. Cloaking technology (called electronic mask) is always seen at work on television, when blue backgrounds are used to make a person invisible on the screen. This technology (optical cloaking) is used to make Romulan spaceships disappear in Star Trek science fiction. Electronic and optical cloaking are, however, different. In optical cloaking the object becomes invisible to visible light wavelengths. Though the object will be there but we will not be able to see it (object). Objects are visible in the optical range because they reflect light, a process also called scattering. Objects absorb light, too, and what is absorbed is not seen. The sky is blue because the atmosphere scat
