Numerical Problems | Chapter 12 Geometrical Optics | Physics 10th | Balochistan Text Book Board скачать в хорошем качестве

Numerical Problems | Chapter 12 Geometrical Optics | Physics 10th | Balochistan Text Book Board

1. The radius of curvature of a spherical mirror is 25cm. What will be its focal length? 2. The focal length of a concave mirror is 8cm. It is placed at 12cm from this mirror, determine the image distance from the mirror. State the nature and size of the image. 3. An object is placed at 10cm from a concave mirror. If mirror magnifies the image four times then calculate the radius of curvature of this mirror. 4. An object is placed 10cm from a convex mirror whose focal length is 15cm. Calculate the position of image from mirror. What is the nature and size of the image? 5. A ray of light enters from air into diamond at an angle of 60° with the normal. Calculate the angle of refraction if refractive index of diamond is 2.42. 6. The real depth of a swimming pool is 2m.What is the apparent depth of the swimming pool if the refractive index of water is (4/3)? 7. The refractive index of ruby is 1.71. Calculate the value of critical angle for ruby. 8. A person uses a lens whose power is -2.5 diopter. What is the nature and focal length of the lens? Write down the type of defect of vision. 9. The focal length of a convex lens is 16cm. Where an object should be placed in order to get an image which is four times magnified? 10. An object is located at 6cm from a concave lens of focal length 18cm. Find the position, nature and magnification of the image.