
Grade 11General Physics
Two lenses of power +12D and -2D are put in contact coaxially.What is their equivalent focal length?


In viewing through a magnifying glass, one usually positions one's eyes very close to the lens. Does angular magnification change if the eye is moved back?
Last Activity: 9 Months ago

Last Activity: 3 Years ago

Last Activity: 3 Years ago

Last Activity: 3 Years ago

Last Activity: 3 Years ago