- Analysis For Part A Converging Lenses 1 Compute The Focal Lengths Of The Three Converging Lenses A B And C From Equa 1 (22.88 KiB) Viewed 16 times
- Analysis For Part A Converging Lenses 1 Compute The Focal Lengths Of The Three Converging Lenses A B And C From Equa 2 (48.37 KiB) Viewed 16 times
- Analysis For Part A Converging Lenses 1 Compute The Focal Lengths Of The Three Converging Lenses A B And C From Equa 3 (19.88 KiB) Viewed 16 times
- Analysis For Part A Converging Lenses 1 Compute The Focal Lengths Of The Three Converging Lenses A B And C From Equa 4 (53.18 KiB) Viewed 16 times
- Analysis For Part A Converging Lenses 1 Compute The Focal Lengths Of The Three Converging Lenses A B And C From Equa 5 (51.23 KiB) Viewed 16 times
- Analysis For Part A Converging Lenses 1 Compute The Focal Lengths Of The Three Converging Lenses A B And C From Equa 6 (42.64 KiB) Viewed 16 times
PROCEDURE FOR PART B: DIVERGING LENS: 1. Set up an arrangement on your optical bench as shown in figure 4.a. Screen IMAGE LENSA OBJECT Xo LENS K A FICURE 41 LENS do Screen -di -x-* ARRANGEMENT OF LENSES FOR DETERMINING THE FOCAL LENGTH FOR A DIVERGING LENS 427 FIG4a FIG4b
ANALYSIS FOR PART B: DIVERGING LENS 1. Compute the focal length of the diverging lens D from equation (1) using Thin-lens equation 1+1-1 2. Calculate the average focal length of fp.
QUESTIONS: 1. Explain what is meant by the focal length of a lens, a real image, a virtual image, and magnification. 2. The Refractive power of a lens (in diopters) R. P. = f (in meters) Find the refractive power of the lenses used in this experiment. 3. The magnification M'is the ratio of the image size h, to the object size h... It is also equal to the negative ratio of the image distance d, to the objec distance do, or Magnification equation ion] M= Image height Object height ha -2--2 Use the values of d, and d, from TABLE 1. to calculate the magnification M for the lenses that you used in the experiment. L5 5. Draw ray diagrams for a concave lens for the situation illustrated. Concave lens: Ray diagrams 4, > 2
Table 1. Data for Converging Lenses 2 3 Focal length OBJECT distance when object is at infinity LENS from Lens d₂ (cm) (cm) A f-8.7 cm 64.5cm f-8.5 cm 66.0cm fA= 8.3 cm 67.8 cm AV A-8.5 cm 66.1cm fa 15.6 cm 80.6cm fa 15.5 cm 69.5cm fa 14.0 cm 55.1cm AV f 15.1 cm 68.4cm fc 17.5 cm 57.0cm f 17.2 cm 62.9cm fc 16.8cm. 59.5cm AV 17-2cm 59.8cm B C 4 IMAGE distance from Lens d₁ (cm) 10.5cm 10.3 cm 10.2 cm 10.3cm 19.4 cm 19.6cm 19.5cm 19.5 cm 24.7cm 24.1cm 24.0cm 24.4cm 5 FOCAL length from Eq. 1. AD) (cm) 6 Description of image (Real, Virtual, Erect, Inverted, Smaller or Larger than Object) Inverted, Small, Real Inverted, Small, Real Inverted, Small, Real
Table 2. Data for Diverging Lens 3 2 Initial Separation OBJECT image between distance of Lens D Lens distance Lens A & of Lens A Lens D do =(x-x₂) Xo X (cm) (cm) cm A&D 44.8 cm 12.5 cm -32.3 cm A & D 27.4cm 16.0 cm -11.4 cm A&D 35.0 cm 13.5 cm -21.5 cm 5 IMAGE distance of Lens D d (cm) 30.5 cm 14.5 cm 25.5 cm 6 FOCAL Length from Eq. 1 (Real fo (cm) 7 Description of Image Virtual, Erect, Inverted, Smaller or Larger than Object) Real, Inverted, Large Real, Inverted, Large Real, Inverted, Large