Want this question answered?
projector have concave or convex
No, a movie projector uses a convex lens.
There are many websites that provide DIY projector plans, But none offer a way to repair a Projector Lens. I would look into how much it is to replace the Lens or the projector all together.
Projector Lens
Convex lens because i said so
Convex lens because i said so
The lens focuses light on the retina (fish have one)
place the lens cap in place.
since you need to show the image on a big screen so you require a diverging lens i.e. a concave lens
since you need to show the image on a big screen so you require a diverging lens i.e. a concave lens
Convex lens because i said so
There are some for sale on ebay.