Geometric Optics Essay - 275 Words

Geometric Optics (Math Problem Sample) Content: Student's Name:Tutor's Name:Course:Date DueGeometric OpticsConverging lens;Incident ray travelling parallel to the principal axis will retract through the lens and travel through the focal point on the lens opposite side.An incident ray that passes through the focal point onto the lens will retract and reflect through the lens.An incident ray passing through the lens centre will continue in the same direction as it had after entering the lens. (Kriss 1998)Let's assume the height of the image is 10cmF=10cmObject height =10cmFocal length= 1/So+1/SiImage height Ho=10cmSo Si Hi Orientation(inverted/upright) ObservedMagnification(hi/ho) TheoreticalMagnification(-si/so) Magnification % error CalculatedFocal length (cm) 20 20 10 inverted 1 0 10 25 15 7.5 inverted 0.75 0 9.36 30 10 5 inverted 0.5 0 7.5 40 5 2.5 inverted 0.25 0 4.4 50 0 0 No image 0 0 50 - Image height =20cmSo Si Hi Orientation(inverted/upright) ObservedMagnification(hi/ho) TheoreticalMagnification (-si/so) Magnification % error CalculatedFocal length (cm) 20 40 25 Inverted 1.25 0 13.3 25 30 18 Inverted 0.9 0 13.6 30 20 11 Inverted 0.6 0 12 40 10 3 Inverted 0.3 0 8 50 1 5 Upright 0.5 -0.05 50 Image height =5cmSo Si Hi Orientation(inverted/upright) ObservedMagnification(hi/ho) TheoreticalMagnification(-si/so) Magnification % error CalculatedFocal length (cm) 20 15 5.6 inverted 1.6 0 1.33 25 10 4 inverted 0.8 0 2.5 30 5 2.8 inverted 0.56 0 6 40 0 0 blurred 0 0