Mobs (with the exception of zombies, spiders, and slime) cannot see through glass. This means that they will not be able to find you if you hide well.
Guardians appear to be able to track players through glass, however because there is no clear line of sight, they do not attack. They're harmless until you get up above the tank and they can see you. At which point they will begin to track you again and alert the other guardians in the area.
So basically, don't stand up above them or behind cover they can't see you behind. Otherwise, you're fine.
Also note that if you run out of room left on your map, more will spawn.
Finally, remember that even though they are non-aggressive when you first encounter them, all guardians will always attack unharmed players who come near their nests.
If you try to attack a guardian, it will attempt to defend itself. If it succeeds, you will receive a message saying "The guardian has been alerted." You have then wasted one of your five attacks for the day. If it fails to defend itself, then you have received a message stating "The guardian has been attacked!" Again, you have wasted one of your five attacks.
It is important to remember that although guardians will not attack players while they are tracking you, they do retain the ability to attack others after they have stopped tracking you.
Ghasts are not able to look through glass. This is because looking through something that transparent requires light, and ghosts are energy beings associated with the darkness side of things. If a ghost can see you, you have made yourself visible to them.
N3cris. They can see you, but they won't detonate until they're within a block of you. As a result, they cannot attack you through glass, stone, or any other medium.
Tinted glass can be used in windows and doors to block visitors from looking inside. This is important if you have items of value that you do not want seen by passersby. Tinted glass is available for all types of windows and doors. It is easy to install, and cannot be noticed when open.
The two main types of tint are horizontal or vertical. With this type of tint, a piece of glass comes down from the top of the window or door, gets tinted, and then goes back up to the top again. This type of tint is used for vehicle windows and garage doors.
With film tint, the entire surface of the glass is covered with a transparent material that blocks out light. This includes windshields, side and rear windows, and transoms (the frame around a window or door). Film tint comes in various colors, including red, blue, green, and gray. It can be as dark as you want it to go. There are two main types of film: single-layer and multi-layer. Single-layer film only has one layer of plastic that blocks out light; it's less expensive than multi-layer film but doesn't block out as much heat.
Spawning. Additionally, the player must not have any overhead blocks that obstruct light in any manner; for example, leaves prohibit phantoms from spawning since they have a light opacity of 2, while glass does not because its light opacity is 0. However, if the player has a torch or other source of light, then this would be considered an opaque block and could not function as glass.
Phantoms can see through almost everything but iron blocks. They cannot see through water or lava though, which would prevent them from seeing you if you were to hide under either one. Phantoms also cannot see through certain types of torches or lamps. If you put a torch inside a chest and open it later, there's a chance that the phantom will go inside and use it despite being invisible.
They can also see through some types of books and scripts. If you type inside a book or scroll then open it up, phantoms will sometimes go inside and read/write to their hearts' content even though they are invisible. This only works with actual pages, though, and not just words on a screen. If you type at the top of a ladder then climb down, there's a chance that the phantom will follow you out.
They can also see through some types of doors.
Because light goes through glass, we can see through it. Our eyes only see objects—chairs, phones, computers, or even tinted glass—through processing light waves reflected off or absorbed by the item. Light is composed of waves of varying sizes. The larger the wave, the farther it travels before being absorbed. Smaller waves are reflected back toward their source.
As waves of different sizes travel through glass, the smaller waves are reflected back to the eye while the larger waves pass straight through. This is why visible light is always shown as either red, orange, yellow, green, blue, or violet depending on how much of its energy has been absorbed by the object.
The color we see as white is actually the combination of the colors of all objects we look at. For example, if you looked at a piece of paper and then at a blank wall, the paper would be white because it reflects some of the blue from the sky and also absorbs some of the red from the earth. If you watched it for several minutes, it would start to turn brown because it is absorbing more and more of the red light from the sun.
If you were to walk into a room full of people, you would see them as white because they are reflecting most of the light that hits them.
A sight glass is essentially a clear glass tube or window inserted in a tank or boiler system that allows an observer to see what is going on within the container, assuring optimal quality and safety. Aside from simple seeing, sight glasses may be used for a variety of other purposes, although this is the most popular. Sight glasses are available in a wide variety of sizes and shapes; however, they all have two things in common: they are transparent and located near water.
Transparent means that light can pass through the glass, showing people or objects on the other side. Near water means that they are usually placed above the level of any water that might be inside the tank or boiler. This prevents anything inside the tank or boiler from being submerged in water.
Sight glasses are commonly used in aquariums to allow people to watch their fish without getting into the water. This is helpful when you want to make sure that nothing harmful is happening to your pets while you are away.
In cooking, a sight glass is used to monitor the progress of a simmering pot of food or liquid. If it starts to smoke or smell badly, the cook is alerted to take action before something serious happens.
In chemistry labs, sight glasses are used to monitor experiments and detect any problems early. They provide instant information about the status of a reaction or process, allowing scientists to take appropriate measures to avoid any bad results.