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www.GOALias.blogspot.com15.3 R15.3 RIGHTOR LEFTEFT!When you see your image in a planemirror, is it exactly like you? Have youever noticed that there is one interestingdifference between you and your imagein a mirror? Let us find out.Activity 15.4Stand in front of a plane mirror and lookat your image. Raise your left hand.Which hand does your image raise(Fig. 15.8)? Now touch your right ear.Which ear does your hand touch in yourimage? Observe carefully. You will findthat in the mirror the ‘right’ appears ‘left’and the ‘left’ appears ‘right’. Note thatonly sides are interchanged; the imagedoes not appear upside down.Now write down your name on a pieceof paper and hold it in front of a planeFig. 15.9 An ambulancemirror. How does it appear in themirror?Boojho saw an ambulance onthe road. He was surprised tosee that the word ‘AMBULANCE’in front was written in a strangemanner.Fig. 15.8 Left hand appears on the right side inthe imageCan you now understandwhy the word ‘AMBULANCE’ is writtenas in Fig. 15.9 ? When the driver of avehicle ahead of an ambulance looks inher/his rear view mirror, s/he can read‘AMBULANCE’ written on it and giveway to it. It is the duty of every one ofus to allow an ambulance to passwithout blocking its way.You might have observed that in theside mirror of a scooter or a car theimages of all the objects appear smallerthan the objects themselves. Have youever wondered why it is so?178SCIENCE