{"id":20027,"date":"2023-01-02T10:00:09","date_gmt":"2023-01-02T04:30:09","guid":{"rendered":"https:\/\/www.aplustopper.com\/?p=20027"},"modified":"2023-01-03T09:33:13","modified_gmt":"2023-01-03T04:03:13","slug":"cbse-class-10-science-lab-manual-refraction-prism","status":"publish","type":"post","link":"https:\/\/www.aplustopper.com\/cbse-class-10-science-lab-manual-refraction-prism\/","title":{"rendered":"CBSE Class 10 Science Lab Manual – Refraction Through Prism"},"content":{"rendered":"
Aim<\/strong><\/span> Materials Required<\/strong><\/span> Theory\/Principle<\/strong><\/span> Angle of Deviation (\u2220\u03b4)<\/strong> Procedure<\/strong><\/span><\/p>\n Observations and Calculations Mean value of angle of incidence, \u2220i =\u00a0\\(\\frac { { \\angle i }_{ 1 }+{ \\angle }i_{ 2 }+{ \\angle i }_{ 3 }+{ \\angle i }_{ 4 } }{ 4 }\\) Result<\/strong><\/span><\/p>\n Precautions<\/strong><\/span><\/p>\n Sources of Error<\/strong><\/span> Viva – Voce<\/strong><\/span><\/p>\n Question 1.<\/span><\/strong> Question 2.<\/span><\/strong> Question 3.<\/span><\/strong> Question 4.<\/span><\/strong> Question 5.<\/span><\/strong> Question 6.<\/span><\/strong> Question 7.<\/span><\/strong> Question 8.<\/span><\/strong> Question 9.<\/span><\/strong> Question 10.<\/span><\/strong> Science Lab Manual<\/a>Science Practical Skills<\/a>Science Labs<\/a>Math Labs<\/a>Math Labs with Activity<\/a><\/p>\n","protected":false},"excerpt":{"rendered":" CBSE Class 10 Science Lab Manual – Refraction Through Prism Aim To trace the path of the rays of light through a glass prism. Materials Required A glass prism, some drawing pins, white paper, a drawing board, adhesive tape, a protractor, a sharp pencil and a measuring scale. Theory\/Principle Refraction of Light Through a Prism […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[6805],"tags":[],"yoast_head":"\n
\nTo trace the path of the rays of light through a glass prism.<\/p>\n
\nA glass prism, some drawing pins, white paper, a drawing board, adhesive tape, a protractor, a sharp pencil and a measuring scale.<\/p>\n
\nRefraction of Light Through a Prism<\/strong>
\nPrism is a transparent refracting medium bounded by atleast two lateral surfaces, inclined to each other at certain angle. It has two triangular bases and three rectangular lateral surfaces. The angle between two lateral surfaces is called angle of prism (\u2220A).
\n
\nFig. 1 shows refraction of light through a prism, where,
\nPQ = incident ray,
\nQM = refracted ray,
\nMR = emergent ray,
\n\u2220A = angle of prism,
\n\u2220i = angle of incidence,
\n\u2220r = angle of refraction,
\n\u2220e = angle of emergence,
\n\u2220\u03b4 = angle of deviation.
\nNote:<\/strong> When a ray of light passes through a prism, it bends towards the thicker part of the prism.<\/p>\n
\nIt is the angle which the emergent ray (produced backward) makes with the incident ray (produced forward ). It depends upon angle of prism (\u2220A), angle of incidence (\u2220i) and angle of emergence (\u2220e) and is given by \u2220\u03b4 = \u2220i + \u2220e – \u2220A.<\/p>\n\n
\n<\/li>\n
\n<\/strong><\/p>\n\n\n
\n S.No.<\/strong><\/td>\n Angle of incidence (\u2220i)<\/strong><\/td>\n Angle of deviation (\u2220\u03b4)<\/strong><\/td>\n<\/tr>\n \n 1.<\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n 2.<\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n 3.<\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n 4.<\/td>\n <\/td>\n <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\u21d2 \u2220i = ……………
\nMean value of angle of deviation, \u2220\u03b4 = \\(\\frac { { \\angle \\delta }_{ 1 }+{ \\angle \\delta }_{ 2 }+{ \\angle \\delta }_{ 3 }+{ \\angle \\delta }_{ 4 } }{ 4 }\\)
\n\u21d2 \u2220\u03b4 = …………..<\/p>\n\n
\n
\n1. Pins may not be exactly perpendicular to the paper.
\n2. The feet of the pins may not be in same straight line.
\n3. In observing images of P1<\/sub> and P2<\/sub>, eye may be very close to the pins.
\n4. Prism may not be fixed properly.<\/p>\n
\nDefine angle of deviation. [NCERT]<\/strong>
\nAnswer:<\/strong><\/span>
\nThe angle made by the incident ray and emergent ray is called angle of deviation.<\/p>\n
\nList the factors on which the angle of deviation through a prism depend. [NCERT]<\/strong>
\nAnswer:<\/strong><\/span>
\nFactors on which the angle of deviation depends are:<\/p>\n\n
\nWhy does a ray of light bend towards the base when it passes through a glass prism? [NCERT]<\/strong>
\nAnswer:<\/strong><\/span>
\nWhen a light ray passes through glass prism, first it travels from rarer to denser medium so, it bends towards the normal or base of prism.<\/p>\n
\nWhy does white light split into different colours when passes through a glass prism? [NCERT]<\/strong>
\nAnswer:<\/strong><\/span>
\nThe refractive index of different colours is different, when a white light passes through the prism, it shows different deviation and splits into its constituent colours.<\/p>\n
\nWhy does white light not split into different colours when it passes through a glass slab? [NCERT]<\/strong>
\nAnswer:<\/strong><\/span>
\nSince, the two faces of glass slab are parallel to each other. Hence, the refracted light rays suffer equal amount of deviation. Thus, they don’t split the white light.<\/p>\n
\nHow can you define an angle of prism?
\nAnswer:<\/strong><\/span>
\nThe angle between two lateral faces of prism is called an angle of prism.<\/p>\n
\nWhat precaution must be taken for the refracting faces of glass prism while tracing the path of ray of light through it?
\nAnswer:<\/strong><\/span>
\nThe faces’of the glass prism must be smooth and transparent without any air bubble or broken edge.<\/p>\n
\nName the process by which when a white light passes through a prism splits into its constituent seven colours.
\nAnswer:<\/strong><\/span>
\nDispersion of light.<\/p>\n
\nGive the range of angle of incidence to complete this experiment accurately and successfully.
\nAnswer:<\/strong><\/span>
\nThe range of angle of incidence is 30\u00b0 to 60\u00b0.<\/p>\n
\nWhat is the relation between angle of incidence (\u2220i), angle of prism (\u2220A), angle of deviation (\u2220\u03b4), and angle of emergence (\u2220e)?
\nAnswer:<\/strong><\/span>
\nThe relation is \u2220i + \u2220e = \u2220A + \u2220\u03b4.<\/p>\n