A telescope is an optical instrument that makes distant objects appear magnified by using an arrangement of lenses or curved mirrors and lenses, or various devices used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation.
The history of the telescope can be traced to before the invention of the earliest known telescope, which appeared in 1608 in the Netherlands when a patent was submitted by Hans Lippershey, an eyeglass maker. Although Lippershey did not receive his patent, news of the invention soon spread across Europe.
This project is great for learning the concept of reflection and refraction of light.
Once you will learn the basics, you can experiment with different body styles and designs to make your telescope more powerful. Make STEM education fun!
The best thing about this project is that you can get most of your “telescope” parts from the trash. You can use many recycling items to create a body of the telescope. Be creative!
For this project, you will also need the following materials:
- Convex lens (D: 7.5cm, F: 35cm)
- Eye Piece lens (D: 2.2cm, F: 35cm)
- PVC pipe
- black card sheet
- Objective lenses/ Primary lenses
- lens focal length 45- 50 cm/ 400-550 mm
- Diameter: 5.2cm / 52mm
- Material: Glass
- Eyepiece / Secondary lens
- Focal length 4 cm/ 40 mm
- Diameter: 2.5cm / 25mm
Telescope Objective/ primary lens and Eyepiece/ secondary lens available in Pakistan (sciencestore.pk)
Note: Lenses are available at sciencestore.pk
- Pen cuter
Make a circle on the cardboard with the help lens
cut the marked circle
Make another circle on the same cardboard with the help of PVC pipe in the centre
then cut the marked circle to make a doughnut shape. Make two doughnut shapes pieces
Take a black chart piece of 25cm" wide and 60cm" length
Placed a lens on a chart sheet and roll it
Insert both the doughnuts shape cardboard inside the chart sheet roll. Make sure both are at a small distance from one another
Cut PVC pipe into two pieces. Make sure one PVC pipe length is 3cm and another length is 17cm
Placed an eyepiece between 3cm and 17cm PVC pipe with the help of a tape
Insert the PVC pipe in the chart sheet roll. Now your astronomical telescope is ready to test
How it works
An astronomical telescope works on the principle that when an object to be magnified is placed at a large distance from the objective lens of a telescope, a virtual, inverted and magnified image of the object is formed at the least distance of distinct vision from the eye held close to the eyepiece.
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