New systems for glasses-free 3D movie theater technology

The video discusses different methods of 3D viewing, including the use of projectors and polarized glasses. It highlights the limitations of some 3D TVs that do not require glasses but have a limited number of viewers. Researchers at Seoul National University are exploring two systems for glasses-free 3D movie theaters, using one projector and multiple screens to achieve the 3D effect for multiple viewers.

What do viewers need to wear to watch 3D movies with projectors?

What is a limitation of some 3D TVs mentioned in the text?

Which university is conducting research on glasses-free 3D movie theaters?

What is the main goal of the systems being experimented with at Seoul National University?

How many projectors are used in the systems being researched?