If your converging lens were placed in water, what would the value of its focal
ID: 1794578 • Letter: I
Question
If your converging lens were placed in water, what would the value of its focal length be? If the distant object used in determining the focal length of the converging lens in part I (1) were actually 40 meters away, what percentage error in/would result? 1. 2. An object and a screen are D cm apart. A lens is placed in a position so as to produce on the screen an image which is larger than the object. If the lens is now moved a distance of d cm a second image is formed on the screen which is smaller than the object. Calculate the focal length of the lens. 3.Explanation / Answer
1)
The focal length increases in water because there is less difference in index of refraction between glass and water than between glass and air. Thus light rays change direction less with water surrounding the glass.