Eyes of the nocturnal birds have large cornea and a large pupil. Very Short Answer Type Questions. Privacy Policy 16.10. Questions Bank Class 8 Science Home Page. The image of an object placed in front of the mirror always forms on the other side of the mirror. | What is the speed of the image? Here you can get Class 8 Important Questions Science based on NCERT Text book for Class VIII. Find the position, nature and size of the final image for reflections first at concave mirror and then at convex mirror. A ray of light parallel to Mirror 1 strikes the Mirror 2. FAQ | 16.10 shows the word REST written in two ways in front of a mirror. Which part of the eye gets affected if someone is suffering from cataract? Is the spherical mirror concave or convex? Refund Policy, You need to login to perform this action.You will be redirected in 8th Class Science Light Question Bank done Light HOTS Subjective Problems Total Question - 15 question_answer1) An object is placed at a distance of 20 cm in front of a plane mirror. An object is placed mid way between them. At what angle will the ray finally emerge? Question from very important topics are covered by NCERT Exemplar Class 8.You also get idea about the type of questions and method to answer in your Class 8th examination. At what angle will the ray finally emerge? Two mirrors A and B are placed at right angles to each other as shown in Fig.16.4. As the object distance is decreased infinity to focal length, l the size of the inverted image increases. What is the distance between the first image at \[{{M}_{1}}\]and the second image formed at\[{{M}_{2}}\]? How many times is a ray of light reflected by two plane mirrors placed parallel and facing each other? | Show that the length of a plane mirror in which a person can see his fall image is half the height of the person. 16.3. Question 2: What is reflection of light? Study Packages We can see a non-luminous object when light: (a) emitted by the object falls on the eye. When an object is placed at a distance of 20 cm from the lens, it is found that the image coincided with the object. Then the minimum length of plane mirror for him to see his full image is ____. Ans. Answer: The process by which the ciliary muscles change the focal length of an eye lens to focus distant or near objects clearly on the retina is called power of accommodation. question_answer8) Two plane mirrors are inclined at an angle of \[{{60}^{o}}\] as shown in the figure. The image of an object placed in front of the mirror always forms on the other side of the mirror. An object is placed between the mirrors at a distance of 4 cm from one of them, say\[{{M}_{1}}\]. Identify the type of the mirror. Lalit Sardana Sir The position of eye with respect to position of bulb is shown in Fig.16.2 as A, B, C and D. In which position mirror will be visible? This phenomenon is called reflection of light. An object is placed at a certain distance in front of a plane mirror. Two plane mirrors are inclined to each other at an angle of \[{{70}^{o}}\]. If the position of the object is changed, the nature and the 3 magnification remains unchanged. Answer: Light is a form of energy. A man 180 cm high stands in front of a plane mirror. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 8. question_answer4) Two mirrors are inclined at a certain angle \[\theta \]. question_answer15) A convex lens of focal length 15 cm is placed in , front of a convex mirror coaxially at a distance of 5cm from the pole of the mirror. | Current Affairs (c) What must be the angle with respect to the incident light at which he should place the mirrors? Sample Papers Copyright © 2007-2020 | | (e) If any of the mirrors is removed, will he be able to see the objects? What is the distance between the first image at \[{{M}_{1}}\]and the second image formed at\[{{M}_{2}}\]? 3 sec, OTP has been sent to your mobile number and is valid for one hour. Find the radius of curvature of the mirror. How is the phenomenon of reflection used in making a kaleidoscope? (iii) The image of an object placed in front of a spherical mirror is virtual. Q3. There is a mistake in each of the following ray diagrams given as Fig. | (b) is reflected from the object towards our eye. question_answer9) A needle 1.5 cm is placed at a distance of 20 cm from a concave mirror of focal length 15 cm. February 19, 2019 by SuccessCDs Team in CBSE Class 8 Science Lessons Explanation, Notes, NCERT Question Answers. How does this structure help them? Then the minimum length of plane mirror for him to see his full image is ____. An object is placed at a distance of 20 cm in front of a plane mirror. About Two plane mirrors are placed parallel to each other. To get fastest exam alerts and government job alerts in India, join our Telegram channel. Find the radius of curvature of the mirror. question_answer2) An object is placed at a certain distance in front of a plane mirror. A concave mirror produces a real image twice the size of the object when placed at a distance of 22.5 cm from it. | When an object is placed at a distance of 20 cm from the lens, it is found that the image coincided with the object. Jobs What is the distance between the mirror and the object? 16.8, so that he could see objects which he could not directly see.
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