This PPT is based on the NCERT grade 7 Science textbook’s 15th chapter, ‘Light’. You might have seen a beam of sunlight when it enters a room through a narrow opening or a hole. You may have also seen beams of light from the headlamps of scooters, cars, and engines of trains. Similarly, a beam of light can be seen from a torch. But what is light? It is a naturally occurring substance that improves vision and makes objects visible. Download both the PPTs on this chapter to learn the concepts explained in the chapter, and ace your school examinations. The topics covered in this part are: * Light travels along a straight line, and * Reflection of light and Right or Left The rest of the chapter is covered in Part 2.

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