Keeping the light source and lens in the same position, turn on the light source and adjust the screen until a clear, real image is formed on the screen. Measure the experimentally determined di and hi, and write your observations in the “Experimental” section of data table 1. 

Data Table 1

 

ho = 1.5 cm

ƒ = 25 cm

Calculated
results
Calculated
results
Experimental
results
Experimental
results
  di hi di hi
Greater than 2ƒ
do = 54 cm

 

    46.4 cm 1.3 cm

do = 50 cm

 

    49.5 cm 1.4 cm
Between ƒ
and 2ƒ
do = 42 cm
    61.5 cm 2.1 cm