FOCAL LENGTH OF A COMBINATION OF LENSES USING NODAL SLIDE ASSEMBLY
Item Code : SED1006
Principle and Working:
The experimental setup is specifically designed to determine the focal length of a combination of two convergent lenses using a Nodal Slide Assembly. The setup consists of a Nodal Slide Assembly, light source, slit, convex lenses, object screen, and base support.The setup is complete in all respects and requires no additional accessories. Practical experience with this setup provides significant educational value for Science and Engineering students.This setup helps students understand fundamental lens properties, such as focal length, focal point, principal point, nodal point, and center of curvature.The focal length (F) of a combination of two convergent lenses using the Nodal Slide Assembly is given by:
where, f1 , and f2 are the focal length of lens 1 and lens 2 respectively.
d is the distance between the two lenses.
- All electrical connections are made using 4mm safety sockets and plugs.
- Saddle can hold rod from 8 to 15mm.
- Heavy, rigid and stable optical bench.
- Height and level adjustment screws.
- 2-12V, 5A, AC/DC power supply with Thermal Safety Switch.
- To determine equivalent focal length of a combination of lenses using nodal slide assembly.
- Optical bench : Length – 1 mtr. with Scale, 4 point levelling. Material Aluminium or MS.
- Transversal slider : 25 – 0 – 25mm, LC 0.01mm.
- Lamp Housing : Aluminium, Bulb 12V 21W, Lens Spherical condenser, Connection 4mm plug lead, Mounting rod 10mm dia.
- Noddle Slide : Angular scale 1800 @ 10, Linear scale 140mm @ 1mm, Lens Holder Single & double arrangement.
- Reflecting Mirror : Size 50x50x6mm, Surface λ/5, Front coated Mounting Rod10mm diameter.
- Slit With Holder : Metal sheet, Type Cross, Mounting Rod 10mm diameter.
- Power Supply : Output 2,3,4,5,6,8,10 & 12V AC/DC full wave rectified, Overload Resettable thermal trip, Input 230 V AC,50 Hz.
| S.No. | Item Name | SED1006 |
|---|---|---|
| 1 | Transverse Slider | 1 |
| 2 | Fixed Slider | 4 |
| 3 | Fixed Slider (Large) | 1 |
| 4 | Optical Bench with Levelling | 1 |
| 5 | Cross Slit Big | 1 |
| 6 | Reflecting Mirror with Mount | 1 |
| 7 | Nodal Slide with Mirror Holder | 1 |
| 8 | Power Supply 2-12V AC/DC | 1 |
| 9 | Lens Double Convex D=50mm, FL+200mm | 2 |
| 10 | Object Screen 15x15cm | 1 |
| 11 | Lamp Source (Round Housing) | 1 |
Note : The standard supply is the Hexagonal Optical Bench (MS). To request the Triangle Optical Bench (Aluminium Extrusion), please specify in your request.