Question Number 113

Asked by anonymous on Sep 19th 2008

Do cell phones cause brain cancer?

Answer: Yes. Probably. According to a new study released by the World Health Organization (WHO) and International Agency for Research on Cancer (IARC), cell phone use is associated with an increased risk of "glioma and acoustic neuroma." Their findings do not quantify the risk, although their press release points to a 2004 study which showed a 40% increased risk of one type of brain cancer in individuals who use their cell phones for half an hour or more every day for ten years.

Reference: http://www.iarc.fr/en/media-centre/pr/2011/pdfs/pr208_E.pdf

Reference: http://www.webmd.com/cancer/news/20110531/expert-panel-cell-phones-might-cause-brain-cancer

Answer posted by Agent Smith on Jun 1st 2011

This answer has been viewed 471 times.

Question Number 60

Asked by anonymous on Sep 11th 2008

Why is the sky blue?

Answer: air particles reflect blue light

Answer posted by anonymous on Nov 8th 2008

This answer has been viewed 926 times.

Another answer: The higher frequencies of light waves (near the ultraviolet end of the spectrum) are absorbed by gas molecules in the atmosphere at a greater rate than lower frequencies (near the infrared end of the spectrum). The gas molecules then emit the photons they have absorbed, at the same frequency as the originally absorbed wavelength. The blue light emitted in this manner then encounters other nearby air molecules, and in a process called Rayleigh Scattering, it is bounced around in all directions until it eventually reaches the eyes of an observer.

Reference: http://www.sciencemadesimple.com/sky_blue.html

Reference: http://en.wikipedia.org/wiki/Rayleigh_scattering#Reason_for_the_blue_color_of_the_sky

Answer posted by Agent Smith on May 25th 2011

This answer has been viewed 463 times.