One engineering design cycle will have these problems: 1. Reliability testing will not be enough to manufacture a robust, reliable product. 2. Many design and manufacturing flaws may not be detected. 3. Cost optimization will be poor. 4. Customer satisfaction will be low. 5. There will be several product recalls to fix problems due to design and manufacturing deficiencies. 6. The product will eventually be withdrawn.
As light is an electromagnetic wave that causes sensation of sight.
Every electromagnetic wave has electrical and magnetic components in it which are perpendicular to the direction of propagation of wave.
The electrical and magnetic components are mutually perpendicular to each other in an electromagnetic wave.
The speed of light in vacuum is c=3\times 10^{8}\ m.s^{-1}, which decreases when it passes through a matter (precisely a transparent medium) which allows the passage of light through it. When the light passes through some transparent matter then its speed decreases as compared to the speed of light in vacuum.
The statement that describes how work and power are similar is D. you must know time and energy to calculate both. I am not completely sure though, so I hope this helps. :)
