15. Light Class 7 Science [LATEST] Solutions Additional Questions in English - CBSE Study
NCERT Solutions for Class 7 Science are carefully prepared according to the latest CBSE syllabus and NCERT textbooks to help students understand every concept clearly. These solutions cover all important 15. Light with detailed explanations and step-by-step answers for better exam preparation. Each Additional Questions is explained in simple language so that students can easily grasp the fundamentals and improve their academic performance. The study material is designed to support daily homework, revision practice, and final exam preparation for Class 7 students. With accurate answers, concept clarity, and structured content, these NCERT solutions help learners build confidence and score higher marks in their examinations. Whether you are revising a specific topic or preparing an entire chapter, this resource provides reliable and syllabus-based guidance for complete success in Science.
Class 7 English Medium Science All Chapters:
15. Light
4. Additional Questions
Additional Questions:
Ques: Why is this suggested that we should not look directly toward the sun or its image?
Ans: Never look directly towards the sun or its image as it may damage your eyes. You may look at the image of the sun when it is thrown on a screen or a wall.
Ques: Why are convex mirror used mainly in vehicles as side mirror?
Ans: Convex mirrors can form images of objects spread over a large area. So, these help the drivers to see the traffic behind them.
Ques: Write three uses of concave mirrors?
Ans: Uses of concave mirrors.
(i) it is used by ENT doctors to see the ears, nose and throat and reflect the light.
(ii) The dentist uses it to get enlarge image of teeth.
(iii) The reflectors of torches, headlights of cars and scooters are concave in shape.
Ques: Write the differences between convex and concave lens.
Ans: The differences between convex and concave lens.
convex lens:
(i) It feels thicker in the middle than at the edges.
(ii) A convex lens converges (bends inward) the light.
(iii) It forms real and inverted images.
concave lens:
(i) It feels thinner in the middle than at the edges.
(ii) A concave lens diverges (bends outward) the light.
(iii) It forms virtual and erect images.
Ques: Why is word “AMBULANCE” written strangely on Ambulance?
Ans: When the driver of a vehicle ahead of an ambulance looks in
her/his rear view mirror, s/he can read ‘AMBULANCE’ written on it and give way to it.
Ques: What is Newton’s Disk?
Ans: When seven colours of rainbow pasting on the disk in their order rotates in daylight it seems white. Such disk is generally known as Newton’s disk.
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