a) For an image that is in front of a mirror, is the imagedistancepositive or negative? b) Given the image distance, what additional information isneededto determine the focal length? Explain. c) For an inverted image is the image height positiveornegative? d) Given the object and image heights and a statement as towhetherthe image is upright or inverted, what additionalinformation isneeded to determine the object distance? e) A small statue has a height of 3.5 cm and is placed in front ofaconcave mirror. The image of the statue is inverted, 1.5 cmtall,and is located 13 cm in front of the mirror. Find the focallengthof the mirror.
a) The drawing shows a ray of light traveling throughthreematerials whose surfaces are parallel to each other. Therefractedrays (but not the reflected rays) are shown as the lightpassesthrough each material. Taking into account the relative sizesofthe angles of incidence and refraction, rank thematerialsaccording to their indices of refraction, greatest first.Providereasons for your rankings. b) A ray of light strikes the a-b interface ata50.0o angle of incidence. The index of refractionofmaterial a is na = 1.20. The anglesofrefraction in materials b and care,respectively, 45.0o and 56.7o. Findtheindices of refraction in these two media
