{"id":87666,"date":"2025-06-01T06:50:51","date_gmt":"2025-06-01T06:50:51","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87666"},"modified":"2025-06-01T06:50:51","modified_gmt":"2025-06-01T06:50:51","slug":"who-among-the-following-has-explained-the-phenomenon-of-photo-electric","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/who-among-the-following-has-explained-the-phenomenon-of-photo-electric\/","title":{"rendered":"Who among the following has explained the phenomenon of photo-electric"},"content":{"rendered":"

Who among the following has explained the phenomenon of photo-electric effect ?<\/p>\n

[amp_mcq option1=”Max Planck” option2=”Albert Einstein” option3=”Neils Bohr” option4=”Ernest Rutherford” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2019<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe phenomenon of the photo-electric effect, where electrons are emitted from a metal surface when light shines on it, was explained by Albert Einstein in 1905. He proposed that light energy is quantized into discrete packets called photons and that the energy of each photon is proportional to its frequency (E = hf, based on Planck’s work). This revolutionary idea successfully explained the observed characteristics of the photo-electric effect, such as the existence of a threshold frequency and the dependence of emitted electron energy on the frequency of light, not its intensity.
\n<\/section>\n
\n– Max Planck introduced the concept of energy quantization (quanta).
\n– Albert Einstein applied the concept of light quanta (photons) to explain the photo-electric effect.
\n– Niels Bohr developed the quantum model of the atom.
\n– Ernest Rutherford discovered the atomic nucleus.
\n<\/section>\n
\nEinstein received the Nobel Prize in Physics in 1921 specifically for his services to Theoretical Physics, and especially for his discovery of the law of the photo-electric effect. This work was crucial in the development of quantum mechanics.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Who among the following has explained the phenomenon of photo-electric effect ? [amp_mcq option1=”Max Planck” option2=”Albert Einstein” option3=”Neils Bohr” option4=”Ernest Rutherford” correct=”option2″] This question was previously asked in UPSC NDA-1 – 2019 Download PDFAttempt Online The phenomenon of the photo-electric effect, where electrons are emitted from a metal surface when light shines on it, was … <\/p>\n

Detailed SolutionWho among the following has explained the phenomenon of photo-electric<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1093],"tags":[1119,1128,1233],"class_list":["post-87666","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1119","tag-physics","tag-scientists-inventions","no-featured-image-padding"],"yoast_head":"\nWho among the following has explained the phenomenon of photo-electric<\/title>\n<meta name=\"description\" content=\"The phenomenon of the photo-electric effect, where electrons are emitted from a metal surface when light shines on it, was explained by Albert Einstein in 1905. He proposed that light energy is quantized into discrete packets called photons and that the energy of each photon is proportional to its frequency (E = hf, based on Planck's work). This revolutionary idea successfully explained the observed characteristics of the photo-electric effect, such as the existence of a threshold frequency and the dependence of emitted electron energy on the frequency of light, not its intensity. - Max Planck introduced the concept of energy quantization (quanta). - Albert Einstein applied the concept of light quanta (photons) to explain the photo-electric effect. - Niels Bohr developed the quantum model of the atom. - Ernest Rutherford discovered the atomic nucleus.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/who-among-the-following-has-explained-the-phenomenon-of-photo-electric\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Who among the following has explained the phenomenon of photo-electric\" \/>\n<meta property=\"og:description\" content=\"The phenomenon of the photo-electric effect, where electrons are emitted from a metal surface when light shines on it, was explained by Albert Einstein in 1905. He proposed that light energy is quantized into discrete packets called photons and that the energy of each photon is proportional to its frequency (E = hf, based on Planck's work). This revolutionary idea successfully explained the observed characteristics of the photo-electric effect, such as the existence of a threshold frequency and the dependence of emitted electron energy on the frequency of light, not its intensity. - Max Planck introduced the concept of energy quantization (quanta). - Albert Einstein applied the concept of light quanta (photons) to explain the photo-electric effect. - Niels Bohr developed the quantum model of the atom. - Ernest Rutherford discovered the atomic nucleus.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/who-among-the-following-has-explained-the-phenomenon-of-photo-electric\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:50:51+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Who among the following has explained the phenomenon of photo-electric","description":"The phenomenon of the photo-electric effect, where electrons are emitted from a metal surface when light shines on it, was explained by Albert Einstein in 1905. 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