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What is the meaning of this statement? 3 years ago Jaiyush19 class 10 cbse ncert light reflection refraction You are given kerosene, turpentine, and water. In which of these does the light travel fastest? Use the information given in Table. 3 years ago Jaiyush19 class 10 cbse ncert light reflection refraction Find out from Table the medium having highest optical density. Also, find the medium with lowest optical density. 3 years ago Jaiyush19 class 10 cbse ncert light reflection refraction Light enters from air to glass having refractive index 1.5. What is the speed of light in the glass? The speed of light in vacuum is 3 x 10^8 m s^-1. 3 years ago Jaiyush19 class 10 cbse ncert light reflection refraction A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why? 3 years ago Jaiyush19 class 10 cbse ncert light reflection refraction A concave mirror produces three times magnified [enlarged] real image of an object placed at 10 cm in front of it. Where is the image located? 3 years ago Jaiyush19 class 10 cbse ncert light reflection refraction Find the focal length of a concave mirror whose radius of curvature is 32 cm. 3 years ago Jaiyush19 class 10 cbse ncert light reflection refraction Why do we prefer a convex mirror as a rear-view mirror in vehicles? 3 years ago Jaiyush19 class 10 cbse ncert light reflection refraction Name a mirror that can given an erect and enlarged image of an object. 3 years ago Jaiyush19 class 10 cbse ncert light reflection refraction The radius of curvature of a spherical mirror is 20 cm. What is its focal length? 3 years ago Jaiyush19 class 10 cbse ncert light reflection refraction Define principal focus of a concave mirror. 3 years ago Jaiyush19 class 10 cbse ncert light reflection refraction A person got his eyes tested by an optician. The prescription for the spectacle lenses to be made reads : Left eye : +2.50 D Right eye: +2.00 D 3 years ago Deepak Rock class 10 lakhmir singh refraction of light The optical prescription for a pair of spectacles is: Right eye: –3.50 D Left eye : –4.00 D (a) Are these lenses thinner at the middle or at the edges? 3 years ago Deepak Rock class 10 lakhmir singh refraction of light Two lenses A and B have power of (i) +2 D and (ii) –4 D respectively. What is the nature and focal length of each lens? (b) An object is placed at a distance of 100 cm from each of the above lenses A 3 years ago Deepak Rock class 10 lakhmir singh refraction of light What do you understand by the power of a lens? Name one factor on which the power of a lens depends. (b) What is the unit of power of a lens? Define the unit of power of a lens. 3 years ago Deepak Rock class 10 lakhmir singh refraction of light Two lenses A and B have focal lengths of +20 cm and, -10 cm, respectively. (a) What is the nature of lens A and lens B? (b) What is the power of lens A and lens B? 3 years ago Deepak Rock class 10 lakhmir singh refraction of light The power of a combination of two lenses X and Y is 5 D. If the focal length of lens X be 15 cm : (a) calculate the focal length of lens Y. (b) state the nature of lens Y. 3 years ago Deepak Rock class 10 lakhmir singh refraction of light A convex lens of focal length 25 cm and a concave lens of focal length 10 cm are placed in close contact with one another. (a) What is the power of this combination? (b) What is the focal length of this combination? 3 years ago Deepak Rock class 10 lakhmir singh refraction of light A convex lens of power 5 D and a concave lens of power 7.5 D are placed in contact with each other. What is the : (a) power of this combination of lenses? (b) focal length of this combination of lenses? 3 years ago Deepak Rock class 10 lakhmir singh refraction of light An object of height 4.25 mm is placed at a distance of 10 cm from a convex lens of power +5 D. Find (i) focal length of the lens, and (ii) size of the image. 3 years ago Deepak Rock class 10 lakhmir singh refraction of light Page 2 / 5 Prev 1 2 3 4 5 Next Share: Super Globals Requests: Server: Options and Features route: community use_home_url: url: https://eanshub.com/community/ pageid:187 default_groupid: 3 2022 How Can We Help? Δ Home About Us Contact Us Privacy Policy Term of Use Copyright © 2020 Eanshub All Rights Reserved
