Question: 5- Apply your scientic knowledge and understanding to solve the following problems. (to reach the highest descriptors SHOW' your intermediate steps] a- Aboy standing 2

5- Apply your scientic knowledge and understanding to solve the following problems. (to reach the highest descriptors SHOW' your intermediate steps] a- Aboy standing 2 H1 in front of a vertical plane mirror looks at the image ofa picture 50 cm behind him as shown. State the following: plane mirror The distance between the mirror and the picture: [' 1 mark) The distance between the picture and the image of the boy: I 1 mark) iii- The distance between the boy and his image: ( 1 mark) The distance between two slits in a double-slit experiment is 3.1 X 10H m. The rst-order bright fringe is measured on a screen at an angle of 9.6D 'om the central maximum. What is the wavelength of the light? (3 mark] c- A concave spherical mirror has a focal length of20 cm i- Locate the image of a pencil that is placed upright 80 cm from the mirror. (2 mark)

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