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4 years ago Shivani siva class 10 lakhmir singh refraction of light The lens A has a focal length of 25 cm whereas lens B has a focal length of 60 cm. Giving reason state, which lens has more power: A or B 4 years ago Shivani siva class 10 lakhmir singh refraction of light An image formed on a screen is three times the size of the object. The object and screen are 80 cm apart when the image is sharply focussed. (a) State which type of lens is used. (b) Calculate focal length of the lens. 4 years ago Shivani siva class 10 lakhmir singh refraction of light An object is 2 m from a lens which forms an erect image one-fourth (exactly) the size of the object. Determine the focal length of the lens. What type of lens is this? 4 years ago Shivani siva class 10 lakhmir singh refraction of light A camera fitted with a lens of focal length 50 mm is being used to photograph a flower that is 5 cm in diameter. The flower is placed 20 cm in front of the camera lens. 4 years ago Deepak Rock class 10 lakhmir singh refraction of light Find the position and size of the virtual image formed when an object 2 cm tall is placed 20 cm from: (i) a diverging lens of focal length 40 cm. (ii) a converging lens of focal length 40 cm. 4 years ago Deepak Rock class 10 lakhmir singh refraction of light A 2.0 cm tall object is placed 40 cm from a diverging lens of focal length 15 cm. Find the position and size of the image. 4 years ago Deepak Rock class 10 lakhmir singh refraction of light An object is placed 20 cm from (a) a converging lens, and (b) a diverging lens, of focal length 15 cm. Calculate the image position and magnification in each case. 4 years ago Deepak Rock class 10 lakhmir singh refraction of light A concave lens has a focal length of 20 cm. At what distance from the lens a 5 cm tall object be placed so that it forms an image at 15 cm from the lens ? Also calculate the size of the image formed. 4 years ago Deepak Rock class 10 lakhmir singh refraction of light Calculate the image distance for an object of height 12 mm at a distance of 0.20 m from a concave lens of focal length 0.30 m, and state the nature and size of the image. 4 years ago Deepak Rock class 10 lakhmir singh refraction of light A concave lens has focal length 15 cm. At what distance should the object from the lens be placed so that it forms an image at 10 cm from the lens? Also find the magnification produced by the lens. 4 years ago Deepak Rock class 10 lakhmir singh refraction of light A concave lens of 20 cm focal length forms an image 15 cm from the lens. Compute the object distance. 4 years ago Deepak Rock class 10 lakhmir singh refraction of light An object 60 cm from a lens gives a virtual image at a distance of 20 cm in front of the lens. What is the focal length of the lens? 4 years ago Deepak Rock class 10 lakhmir singh refraction of light A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens? Draw the ray diagram. 4 years ago Deepak Rock class 10 lakhmir singh refraction of light An object is placed at a distance of 4 cm from a concave lens of focal length 12 cm. Find the position and nature of the image. 4 years ago Deepak Rock class 10 lakhmir singh refraction of light A 50 cm tall object is at a very large distance from a diverging lens. A virtual, erect and diminished image of the object is formed at a distance of 20 cm in front of the lens. 4 years ago Deepak Rock class 10 lakhmir singh refraction of light The lens A produces a magnification of, -0.6 whereas lens B produces a magnification of +0.6. (a) What is the nature of lens A? (b) What is the nature of lens B? 4 years ago Deepak Rock class 10 lakhmir singh refraction of light What kind of lens can form : (a) an inverted magnified image? (b) an erect magnified image? (c) an inverted diminished image? (d) an erect diminished image? 4 years ago Deepak Rock class 10 lakhmir singh refraction of light When an object is placed 10 cm in front of lens A, the image is real, inverted, magnified and formed at a great distance. When the same object is placed 10 cm in front of lens B, the image formed 4 years ago Deepak Rock class 10 lakhmir singh refraction of light Page 4 / 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
