{"id":136,"date":"2014-11-10T08:24:52","date_gmt":"2014-11-10T08:24:52","guid":{"rendered":"http:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/ppp-exercise-6b\/"},"modified":"2014-12-01T08:02:20","modified_gmt":"2014-12-01T08:02:20","slug":"ppp-exercise-6b","status":"publish","type":"page","link":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/ppp-exercise-6b\/","title":{"rendered":"PPP Exercise 6B"},"content":{"rendered":"<p>1.\tAn ultraviolet lamp has a frequency of 1 X 10<sup>15<\/sup> Hz. Calculate the wavelength of the light if it travels at 3 X\uf0b4 10<sup>8<\/sup> m s<sup>-1<\/sup>. <\/p>\n<p>2.\tA radio station broadcasts its radio signal at a frequency of 97.7 MHz. <\/p>\n<p>(a)\tWhat speed do the radio waves at?<\/p>\n<p>(b)\tCalculate the wavelength of the waves.<\/p>\n<p>(c)\tCalculate the time it takes the radio waves to travel 100 km?<\/p>\n<p>3.\tAn infrared source emits waves with a wavelength of 100 \u03bcm. Calculate the frequency of these waves.<\/p>\n<p>4.\tGamma rays travel from the Sun at a speed of 3 X 10<sup>8<\/sup> ms<sup>-1<\/sup>. <\/p>\n<p>(a)\tCalculate the time it takes for the rays to reach Earth if the Sun is<br \/>\n1.5 X 10<sup>11<\/sup> m away.<\/p>\n<p>(b)\tCalculate the frequency of the gamma rays if they have a wavelength<br \/>\nof 3 X 10<sup>-12<\/sup> m.<\/p>\n<p>5.\tA mobile phone network uses microwaves with a frequency of 1800 MHz.<\/p>\n<p>(a)\tCalculate the wavelength of the microwaves.<\/p>\n<p>(b)\tCalculate the time it takes for the waves to travel from the phone to a receiving mast 5 km away.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. An ultraviolet lamp has a frequency of 1 X 1015 Hz. Calculate the wavelength of the light if it travels at 3 X\uf0b4 108 m s-1. 2. A radio station broadcasts its radio signal at a frequency of 97.7 MHz. (a) What speed do the radio waves at? (b) Calculate the wavelength of the &hellip; <a href=\"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/ppp-exercise-6b\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">PPP Exercise 6B<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2454,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-136","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/pages\/136","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/users\/2454"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/comments?post=136"}],"version-history":[{"count":2,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/pages\/136\/revisions"}],"predecessor-version":[{"id":215,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/pages\/136\/revisions\/215"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphyprelimpractice\/wp-json\/wp\/v2\/media?parent=136"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}