This question is related to the emission of electrons when light shines on an metal. (Photoelectric effect)
With the classical theory, it was thought that increasing or decreasing the intensity of light would increase or decrease the kinetic energy of the electron.,
Another expected result was that time gap between when light strikes the metal and when electrons are ejected, would depend on the intensity of such light.
However, the experimental results were not consistent with the particle theory of light. So your answer is A.
Later on this effect was correctly explained by Einstein based on Planck's findings.
Answer:
Provision of both audio and video
,dedicated support
Explanation:
Free services are not dedicated digital lines so there is no guarantee of high-quality sound or a reliable connection during the call. Some common issues are background noises, crackling, echoes, distortion, quietness and drop-outs.Free services also don't offer dedicated support so if anything goes wrong there's nobody available to help you. Any of these problems can ruin the productivity and flow of your meeting.
Answer: No
Explanation: Spread spectrum transmission is the wireless transmission technique for the wide channel that helps in decrement of the potential interference.The transmission of signal is based on the varying the frequency knowingly to achieve larger bandwidth.
The use of spread spectrum transmission in the WLAN(wireless local area network)is used for the regulatory purpose The regulation is the controlling of the area through policies.Thus,security is not the service that is provided to WLAN by spread spectrum transmission.
