Boojho and Paheli were given one mirror each by their teacher. Question 2. You can refer to NCERT Solutions for Class 7 Science Chapter 7 Weather, Climate and Adaptations of Animals to Climate to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. The inner surface of a steel spoon acts as a ………………….. mirror. Name the colours include in the composition of sunlight. A convex lens always produces a real image. False, in a convex spherical mirror, reflection of light takes place out the bent out (bulging out) surface. (a) when the sun is in front of you ………………….. lens is also known as a magnifying glass. This means that the mirrors of Boojho and Paheli respectively are [NCERT Exemplar] Answer: 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. (b) cannot be formed on the screen Question 4. In the formation of a rainbow, what acts as tiny prisms? The image formed by a concave mirror is inverted when the object is kept far from the mirror. On identifying the letters of newspaper, we can differentiate the two types of lenses. 2. (c) plane mirror and convex mirror, Question 2. Question 13. Question 10. (c) both concave mirror and convex lens, Question 11. Choose the correct answer: Mention any two letters of English alphabet whose image formed in a plane mirror appears exactly similar to the letters. Answer: Answer: The image formed by a lens is always virtual, erect and smaller in size for an object kept at different positions in front of it. Explain why. NCERT Exemplar Class 7 Science is very important resource for students preparing for VII Board Examination. Question 25. Answer: When light falls on a shiny surface, most of it bounces back. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 7. In a convex spherical mirror, reflection of light takes place at a bent in surface. They were shouting like a 5 years old child that they wanted the dinner so much eagerly in order to fulfil their stomach. Match the Columns Mention the type of image formed on a cinema screen. Consider if one half of a convex lens is covered with a black paper, then state whether this lens produces a complete image of the object. 11. So, it means that the object is also 6m away from the mirror. The outer surface of a flat steel plate acts as a ………………….. mirror. All the questions are taken from NCERT Books for Class 7 Science only. Now, make a small hole at the centre of the disc. After doing one test, click on Start a New Test for more practice. (b) which cannot be formed on the screen. Download CBSE Class 6 Science HOTs Light Shadows and Reflections in pdf, Science High Order Thinking Skills questions and answers, CBSE Class 6 HOTs Light, Shadows and Reflections. How will you identify each one of them? The straw appears to break at the surface of the water due to refraction of light. After sometimes, he got scolded by his lab teacher for not performing the experiment. The distance between the mirror and his image is 6 m. If the person moves 2 m towards the plane mirror, what would be the distance between the person and his image? What type of mirror should he use? The concave reflecting surface of a torch got rusted. False, a concave mirror always forms an erect, virtual and enlarged (larger than the object) image. (c) Mention the values shown by Priyanka here towards her family. Why is this type of mirror chosen? He recalled reading that such emergency vehicles often have their name written in the mirror (AMBULANCE) or writing, i. e. What effect would this have on the beam of light from the torch? Question 2. (b) The image which cannot be formed on the screen is virtual image. [NCERT Exemplar] Get up to 100% scholarship and cash awards. Question 17. You can get an inverted image from. (Value Based Question] (c) Ramesh seems to be quite innovative with respect to the scientific methods and also very eager to learn science regarding phenomena. (d) 0.25 m The inner surface of the reflector of a torch acts as a ………………….. mirror. Question 5. All educational material on the website has been prepared by the best teachers having more than 20 years of teaching experience in various This means that the mirrors of Boojho and Paheli are, respectively. False, the image formed in a plane mirror is always erect and virtual. So, they are called spherical mirrors. But if plane mirror is used, we are not able to see large area of traffic which may be difficult for driving vehicle and can cause accident. (b) Both convex and concave mirrors are represented by the shining steel spoon. Since, in first case light rays are converging towards a point, so the lens A will be convex and in case of lens 8, light rays diverge or spread out. The image formed in a plane mirror is erect, enlarged and virtual. 2. lateral inversion Plane mirror In case of plane mirror, image will be virtual, erect and of same size as that of object. 10. (b) Concave lens and convex mirror So, greater the shining and smoothness of the surface, greater will be the reflection. Question 20. (a)-(vi) Question 4. (a) Only concave mirror Which of the following always diverge light rays? Answer: (d) concave lens provided the image is of the same size. True He quickly made way for the ambulance, murmuring a quick prayer for the speedy recovery of the patient inside the ambulance. Since, the image of candle formed in the plane mirror cannot be formed on a screen, which means that the image of candle in the plane mirror is a virtual image. (c) concave lens provided the image is larger than object. 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. NCERT Exemplar Class 7 Science is very important resource for students preparing for VII Board Examination.Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 7. State in brief what we can demonstrate by rotating Newton’s colour disc very fastly. Give the form of energy that produces the sensation of vision. Convex mirror is used as a side mirror in a scooter because it can form images of objects spread over a larger area. Is it possible to obtain the image on the screen when the candle is too closed to the concave mirror? Since, image formed by the plane mirror shows lateral inversion, i.e. In case of convex mirror, it will give a wider field of view, i.e. (b) 1 m Question 2. (b) concave mirror or convex lens, Question 7. (c)-(iv) The outer shining surface of a round bottom steel bowl acts as a ………………….. mirror. Such types of lenses which always form virtual, erect and smaller image in spite of the different positions of an object are called concave lens. Answer: 7. seven True 10. Answer: Match the Columns I with Column II. Answer: Question 23. Name the phenomenon that is involved in the formation of image of an object by a concave mirror. Question 8. Answer: (a) 2 m Draw a diagram showing the reflection of a light ray from a plane mirror. Explain. Answer: [NCERT Exemplar] Answer: (d) only at the time of sunrise Spectrum is the band of colours seen when the white light passes through the prism and splits into seven colours. Concave mirror In case of concave mirror, image may be real, virtual and magnified or diminished. (b) Name the constituent colours of white light. What is a _____? 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. State in brief about the term lens. The distance between an object and a convex lens is changing. False, a concave mirror is a mirror which forms the magnified image of an object. Such an image could be formed by [NCERT Exemplar] Answer: Answer: 1. Question 9. You are given three mirrors of different types. Questions of level-I Olympiad exams will be 60% from the current class syllabus and 40% from the previous class syllabus, e.g. Answer: State the correct sequence (1-7) of colours in the spectrum formed by the prisms A and B, shown in Figure 15.2. Will he be able to observe a band of seven colours? Assume, a person is standing in front of a plane mirror. 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. The side mirror of a scooter got broken. Fill in the Blanks Suppose we wish to obtain the real image of a distant tree. Question 7. 1. Now, pW a vertical screen behind the plane mirror (where the image of candle appears to be situated), then we will notice that the image of candle cannot be formed on the screen. Intersection of rays and can be either larger or smaller depending on the of. 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