Now, what if we set the glass container on a scale in an actual room?

"Concert hall" can either mean the actual room where the concerts takes place, or the whole building.

Most of the images on these pages depict actual rooms.

Originally, an observer had to enter an actual room, in a which a pinhole was made on one wall.

Viewed from a middle distance, the images seem part of the building's structure, creating the illusion that you are looking into actual rooms.

They were lightweight, took up no actual room, and could be surprisingly useful.

It was almost like being inside the actual room!

The T-intersection behind her, like several she'd passed, was an actual room.

The house has a roomlike garden at the center embraced on three sides by actual rooms.

Guests will wait in an actual green room, not out in the hall at the water cooler.