All educational material on the website has been prepared by the best teachers having more than 20 years of teaching experience in various Answer: 11. 11. Also, explain why does it take place? You also get idea about the type of questions and method to answer in your Class 7th examination. Explain. [Value Based Question] True/False (a) violet To obtain an enlarged image of an object, you can use either Plane mirror In case of plane mirror, image will be virtual, erect and of same size as that of object. This article will answer your questions on the propagation of light, more specifically the rectilinear propagation of light. ANTHE helps students to know their potential at All India Level and prepare under the expert guidance of Aakash. (a)-(vi) Question 14. In case of convex mirror, it will give a wider field of view, i.e. 3. Since, after the actual intersection of rays, the image obtained on the screen is always real image. Answer: Light energy is the form of energy which produces the sensation of vision. 3. The side mirror of a scooter got broken. (b) The outer surface of a flat steel plate acts as a ___________ mirror. State whether the following statements are True or False. Questions for he most important chapters will be picked and asked in the examinations. Question 7. Answer: So, dispersion of light is phenomenon of splitting up of white light into seven colours on passing through a transparent medium like a glass prism. If we see the figure, then we will find that the length and breadth of the image of the candle and its flame to be the same as that of the original candle and its flame. Answer: When we see the mirror, the image of candle appears to be formed behind the mirror. Give reason. Question 3. [NCERT Exemplar] (b) when the sun is behind you Real image is an image which is formed on a cinema screen. The sides of an object and its image formed by a concave mirror are always interchanged. Is the image formed by a plane mirror is always upright? The image formed by a concave mirror is inverted when the object is kept far from the mirror. The mirror which can form a magnified image of an object is both convex and concave mirrors. The given figures show the path of light through lenses of two different types represented by rectangular boxes A and B. As we know that an image is formed by the actual intersection of rays and can be obtained on the screen. (c) when the sun is overhead 7. seven Question from very important topics are covered by NCERT Exemplar Class 7.. You also get idea about the type of questions and method to answer in your Class 7th examination. The lens which diverges a beam of parallel rays of light is a concave lens. On decreasing the distance between the object and lens, the size of the image increases, the nature of the lens will be convex type. 3. (d) An object can be seen only if it emits light. Briefly mention whether mirror change the direction of light. Last Sunday Girish’s mother, Priyanka was preparing the dinner in her kitchen for Girish and his father. [NCERT Exemplar] So, it means that the object is also 6m away from the mirror. Mention any inconvenience that the driver of the scooter will face while using it? Mention the type of image formed on a cinema screen. (b) concave mirror or convex lens Question 22. Question 12. True On identifying the letters of newspaper, we can differentiate the two types of lenses. [NCERT Examplar; HOTS] [NCERT Exemplar] (b) which cannot be formed on the screen. 2. Question 7. (b) concave lens provided the image is smaller than object. It was observed that when the distance between an object and a lens decreases, the size of the image increases. Mention the type of image No, when the candle is too closed to the concave mirror. Briefly tell that how many reflected rays can be obtained from a single incident ray in respect of a plane mirror. 9. An erect and enlarged image of an object is formed on a screen. (a) plane mirror and concave mirror 6. Since, a plane mirror will produce an image of the same size as our face while a concave mirror will produce a magnified image and our face will look much bigger and on other sides, a convex mirror will produce a diminished image and our face will look much smaller like a small child. Important questions for class 7 science is one of the most vital resources for the students who are preparing for the class VII examination. CBSE Important Questions for Class 7 Science, NCERT Important Questions for Class 7 Science, CBSE 12 Class Compartment Result 2020 (Out) – Check at cbseresults.nic.in, CBSE Class 10 Result 2020 (Out) – Check CBSE 10th Result at cbseresults.nic.in, cbse.nic.in, IARCS Olympiads: Indian Association for Research in Computing Science, Breaking: CBSE Exam to be conducted only for Main Subjects, Class 7 Important Questions for Science - Water : A Precious Resource, Boojho and Paheli were given one mirror each by their teacher. Here is courtesy concerned for other, sympathy, knowledgeable image at any distance of the object right... And 12 also a particle bulging out ) surface attached file will always be virtual, erect and image... Real, virtual and magnified or diminished the raindrops suspended in the middle than at the of. From a laser torch to fall on a prism and splits into seven colours are mixed together, white... 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