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                <text>Kleczek, Jakes</text>
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                <text>Heisenberg probably slept here</text>
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                <text>A lively and extremely accessible introduction to seven strikingly original thinkers who provided the world with new views of reality. Presents the history of physics through abbreviated biographies which concentrate on the personalities of the physicists and their scientific accomplishments. Offers remarkably clear explanations of such topics as Heisenberg's Uncertainty Principle, curved space and the famous puzzle known as "Schrodinger's Cat." Includes a handy timeline of modern discoveries in physics, a glossary of important terms, illustrations and portraits of each of the physicists.</text>
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                <text>&lt;span class="goog_qs-tidbit goog_qs-tidbit-0"&gt;Werner Heisenberg stond aan de basis van de kwantummechanica. Hij werd als jongste Duitser ooit&lt;/span&gt; benoemd tot hoogleraar en kreeg een Nobelprijs voor zijn baanbrekende werk in de fysica. &lt;br /&gt;&lt;br /&gt;
Toen Hitler begin jaren dertig aan de macht kwam in Duitsland, besloot Heisenberg zich, na een aanvankelijke confrontatie, te schikken naar de wensen van het nazi-regime. Tijdens de oorlog leidde hij het Duitse kernfysische onderzoek. In die tijd sprak hij met Niels Bohr over het grootste geheim van zijn tijd: de atoombom. &lt;br /&gt;&lt;br /&gt;
Op 6 augustus 1945 werd Heisenberg gearresteerd door de geallieerden. In gevangenschap hoorde hij dat de Amerikanen al een atoombom hadden gemaakt en zelfs hadden gebruikt, om Hiroshima en Nagasaki in de as te leggen. &lt;br /&gt;&lt;br /&gt;
Dit boek schetst het leven van een groot, maar uiterst controversieel wetenschapper, de bedenker van de onzekerheidstheorie: 'Hoe preciezer de positie van een deeltje is bepaald, des te onzekerder is het momentum van dat deeltje en vice versa.</text>
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                <text>De zon heeft altijd een belangrijke rol in het leven van mensen op aarde gespeeld. Al tijdens de oudste beschavingen werden buitengewone monumenten opgericht om de zonnecyclus zeer precies te volgen. Niet alleen onze kalender gaat uit van de stand vn de on en de sterren, ook geloven veel mensen dat deze de inhoud van ons leven bepaalt. Zonsverduisteringen waren en zijn indrukwekkende verschijnselen. Op deze DVD is de volledige serie opnames te zien van de totale zonsverduisteing in 1996 in India, speciaal voor deze DVD vervaardigd.</text>
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                <text>&lt;p&gt;&lt;span&gt;Hemelbesotmers biedt een fascinerende kijk op de wereld van de austonauten en kosmonauten.  De supersterren Armstrong en Gagarin komen aan bod, maar ook de ruimtevaarders die uit de boot vielen en in de vergetelheid op aarde achterbleven. Het boek is geschreven in de tijd dat de bouw van het ISS op stapel stond en stelt zich terecht enkele kritische vragen over de bemande ruimtevaart: worden er daar boven echt baanbrekende experimenten gedaan? Verdienen austronauten nog steeds de heldenstatus die ze toebedeeld krijgen? En wanneer mag de gewone mens de ruimte in?&lt;/span&gt;&lt;span&gt; &lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span&gt;Ondertussen kennen we het antwoord op de laatste vraag (ten minste voor kapitaalkrachtige “gewone” mensen)&lt;/span&gt;&lt;span&gt; &lt;/span&gt;&lt;/p&gt;</text>
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                <text>Asfaltspiegelingen, fata morgana's, blinde stroken of zones in de ondergaande zon: het zijn regelmatig optredende hemelverschijnselen die zich in de buurt van de horizon afspelen. Luchtspiegelingen zijn het. Marcel Minnaert heeft in zijn magistrale De natuurkunde van 't vrije veld de aandacht op deze en andere fenomenen gericht en ze met middelbare schoolwiskunde en -natuurkunde van zijn tijd beschreven. We spreken eind jaren dertig van de vorige eeuw.&lt;br /&gt;&lt;br /&gt;
De verschijnselen laten zich goed verklaren in termen van geometrische optica, dat is de theorie van de lichtstralen met daarin onder meer de brekingswet van Snellius. Belangrijk is dat zich in de atmosfeer op zekere hoogte een warmere laag vormt, waarin zowel kaatsing als breking kan optreden. Hierdoor kan in het gezichtsveld van een waarnemer een sector ontstaan rondom de horizontale kijkrichting, waarbinnen de beelden als het ware vervangen worden door beelden achter de horizon. Deze theorie is rond 1920 ontwikkeld door Alfred Wegener.&lt;br /&gt;
Het eerste deel van dit boek behandelt deze theorie vanuit elementaire wiskunde, die enige euclidische meetkunde en differentiaalrekening behelst. De theorie gaat uit van het Principe van Fermat waarbij lichtstralen gekarakteriseerd worden als paden van de kortste tijd. Het blijkt dat Johann Bernoulli's brachistochrone probleem naadloos op deze zelfde wiskunde past. In een tweede deel wordt het Principe van Fermat nader uitgewerkt in termen van de beroemde Ierse wiskundige Hamilton, waarbij variatierekening en differentiaalmeetkunde een belangrijke rol krijgen.&lt;br /&gt;</text>
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