• A microscope has a 12.0x eyepiece and a 59.0x objective lens which are separated by 20.0 cm apart. What is the effective magnification of the microscope? A candle of a height of 3.0 cm is placed 4.0 cm in front of a thin converging lens of a focal length of 8.0 cm. What could be the height of the resulting image? Suppose that in a weather forecasting station in Nueva Ecija a picture of a typhoon 2.5 cm wide on the CCD is projected to an upright image 3.0 m wide on a screen that is 18 m away from a lens in a briefing room.
• What type of lens was used and what is its focal length? Note: Be careful with the signs. When distant objects are placed in front of an automatic camera, the distance of the lens from the CCD adjusts to 40.0 mm. If an object is 0.54 m in front of the lens, the distance of the lens from the CCD would be?