Fw: Physics: Why don’t photons have mass?

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   ----- Forwarded Message ----- From: "Quora Digest" <[email protected]> To: "[email protected]" <[email protected]> Cc:  Sent: Mon, Sep 2, 2019 at 20:13 Subject: Physics: Why don’t photons have mass?  @media screen and (max-width:480px){#yiv6148454356 .yiv6148454356background_inner{padding:0!important;background:#fff!important;}#yiv6148454356 .yiv6148454356container{padding:0 8px 16px!important;}#yiv6148454356 .yiv6148454356footer_container{border-top:1px solid #e2e2e2!important;}#yiv6148454356 .yiv6148454356AnnualThankYouEmail .yiv6148454356background_inner{padding:10px 0!important;}#yiv6148454356 .yiv6148454356polish_background_inner{padding:10px 0!important;}#yiv6148454356 .yiv6148454356polish_header_logo img.yiv6148454356header_logo_img{width:118px!important;min-height:40px!important;}#yiv6148454356 .yiv6148454356polish_header_title{font-size:16px!important;padding-top:0!important;padding-bottom:5px!important;}#yiv6148454356 .yiv6148454356polish_question_text{line-height:1.3!important;}#yiv6148454356 .yiv6148454356polish_story .yiv6148454356voters_list, #yiv6148454356 .yiv6148454356polish_story .yiv6148454356user_link{line-height:1.5!important;}#yiv6148454356 .yiv6148454356polish_story .yiv6148454356truncated_q_text, #yiv6148454356 .yiv6148454356polish_story .yiv6148454356qtext_para{line-height:1.5!important;}#yiv6148454356 .yiv6148454356polish_story .yiv6148454356content_header{padding:6px 0!important;}#yiv6148454356 .yiv6148454356EndOfYearLookbackEmail .yiv6148454356stat_large{font-size:28px!important;}#yiv6148454356 .yiv6148454356EndOfYearLookbackEmail .yiv6148454356content_text{text-align:center!important;}#yiv6148454356 .yiv6148454356EndOfYearLookbackEmail .yiv6148454356half_column{width:100%!important;}#yiv6148454356 .yiv6148454356EndOfYearLookbackEmail .yiv6148454356img_wrapper{margin:10px auto!important;}#yiv6148454356 .yiv6148454356TopicDigestEmail .yiv6148454356topic_digest_header_logo img.yiv6148454356polish_header_logo_img{width:89px!important;min-height:30px!important;}#yiv6148454356 .yiv6148454356TopicDigestEmail .yiv6148454356topic_digest_header_title{font-size:16px!important;padding-top:0!important;padding-bottom:5px!important;}#yiv6148454356 .yiv6148454356WriteDigestEmail .yiv6148454356question_text .yiv6148454356rendered_qtext{font-size:16px!important;}#yiv6148454356 .yiv6148454356email_app_link-content{display:block!important;text-align:center!important;}#yiv6148454356 .yiv6148454356email_app_link-text, #yiv6148454356 .yiv6148454356email_app_link-badges_wrapper{display:block!important;}#yiv6148454356 .yiv6148454356email_app_link-text{padding-bottom:0!important;}#yiv6148454356 .yiv6148454356email_app_link-badges_wrapper{padding-left:10px!important;}}@media screen and (max-width:600px){#yiv6148454356 .yiv6148454356DigestEmail .yiv6148454356mobile_image.yiv6148454356digest_ad{display:table!important;}#yiv6148454356 .yiv6148454356DigestEmail .yiv6148454356desktop_image.yiv6148454356digest_ad{display:none!important;}}
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| Answer: First out, a photon is a packet of light.​ Well actually a packet of el.​.​.​
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First out, a photon is a packet of light. Well actually a packet of electromagnetic radiation if you're pedantic. You can have x-rays, gamma rays, UV rays, infrared rays, m...
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Fluoroantimonic acid is probably the best contender. It’s a superacid (any acid stronger than pure sulfuric acid is a superacid) made of [math]H^+ [/math]and [math]SbF_6^-[/math] which is made when you mix hyd...
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