MrN Physics Tuition in A level and GCSE Physics AQA GCSE Physics Spec P3 Optics Questions
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1 Q1. The diagram shows a ray of light passing through a diverging lens. Use the information in the diagram to calculate the refractive index of the plastic used to make the lens. Write down the equation you use, and then show clearly how you work out your answer. Refractive index =...
2 The focal length of the lens is 5 cm. A student looking through the lens sees the image of a pin. Complete the ray diagram below to show how the image of the pin is formed. (Total 5 marks) Q2. The diagram shows the cross-section of an eye. Use words from the box to complete each sentence. ciliary muscle cornea iris pupil The shape of the lens is changed by the..., this allows the lens together with the... to focus light onto the retina.
3 A man, as he gets older, needs to hold a book further from his eyes in order to be able to see the writing clearly. The diagram shows that his eye lens is not able to focus light on the retina. (i) How has the near point of the man s eyes changed as he has got older? (1) (ii) The problem can be solved by wearing reading glasses. Complete the diagram below to show how the lens below is able to correct the man s vision. (c) Give two similarities between an eye and a camera (Total 7 marks)
4 Q3. Both X-ray machines and CT scanners are used to produce images of the body. The diagram shows an X-ray photograph of a broken leg. Before switching on the X-ray machine, the radiographer goes behind a screen. Explain why the radiographer does this. The following is an extract from a newspaper article. X-rays cause 700 new cancers each year in the U.K. Each year there are about new cancer cases in the UK, of which, about 700 may be due to the use of X-rays to diagnose illness. The article was reporting on a scientific research project first published in a medical journal. What evidence would the scientists have collected to come to the conclusion that X-rays can cause cancer?
5 (c) Explain the advantage of a CT scan compared to an X-ray. (Total 7 marks)
6 Q4. The ray diagram shows a converging lens being used as a magnifying glass. The diagram has been drawn to scale. What name is given to the type of lens used as a magnifying glass? (1) Calculate the magnification produced by the lens. Write down the equation you use, and then show clearly how you work out your answer Magnification =... (c) Describe the image produced by a magnifying glass. (Total 6 marks)
7 Q5. Each diagram shows a light ray incident on a glass-air boundary. The critical angle for glass is 42. Which one of the diagrams, A, B, C or D, shows total internal reflection? Write the correct letter in the box. (i) Complete the diagram to show the path taken by the light ray as it travels through the optical fibre. (1) (ii) The diagram shows an endoscope being used by a doctor to look inside a patient s stomach. Light travels into the stomach through a bundle of optical fibres. The following sentences describe how the endoscope allows the doctor to see inside the patient s stomach. The sentences are in the wrong order. Q R S T U Light passes through a bundle of optical fibres into the patient s stomach. The inside of the stomach reflects some of the light. The optical fibres take the light to an eyepiece. The doctor looks through the eyepiece to see inside the patient s stomach. The reflected light passes through a second bundle of optical fibres. Arrange these sentences in the correct order. Start with letter Q. (Total 6 marks)
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