Aden Harili

Agnes Septiani

Alvia Hamulatsari

Anindhita Harwati

Anton Wahyono

Presentation Proposal Telescope Star

The materials to make telescope :

1. Timber

2. Carton

3. Lens

4. Nail

5. Glue

6. Pack suttle cock

How to make telescope :1. Cut 3 timbers with the long 120 cm.

2. Arranged the 3 timbers for buffer the telescope.

3. Stick the carton to pack suttle cock agree with focus (Fob + Fok).

4. Cut the carton.5. Stick on the timber.

6. Enter telescope in the stick.7. Pair the lens in telescope.

Objective Lens :Distance shadow : 20 cm

Distance object : 18 cm

Diameter : 5 cm

Okuler Lens :Distance shadow : 50 cm

Distance object : 73 cm

Diameter : 5 cm

Look for Objective Lens1/f = 1/s + 1/s’

= 1/18 + 1/20

= 10/180 + 9/180

= 19/180

F = 180/19

= 9,47

Look for Okuler Lens1/f = 1/s + 1/s’

= 1/73 + 1/50= 50/3650 + 73/3650= 123/3650

F = 3650/123= 29,674

D = Lob + Lok

= 9,47 + 29,674

= 39,144

….Thank you for your attention, I hope that useful for us….