There is no way to know exactly when to bend it. It comes with practice and feel. The best approach is to heat the glass tubing gradually, and begin applying pressure while turning the tubing in the fingers to keep it rotating. Eventually, you will begin to feel the tubing "give", and in a second or two, it will bend.
heat and re-mould. not a diy process generally
The Tempering of glass is done by firing the glass in a gas fired "oven"
Depending on the thickness and configuration, some force, and possibly some heat, would need to be applied.
An object which does not bend is said to be rigid.
Some of the light is reflected off the glass at the same angle - in a manner and angle similar to that of a ball deflected off a surface at a similar angle. This is what happens when light reflects from car windows into our faces. Much of the light, however, will penetrate the glass, so that the light source is seen from the other side. Nevertheless, on contact with the glass, the light that penetrates will be refracted (bent) and travel through the glass at a different angle from that of its original contact with the glass; but once having travelled through the glass, it will leave at its original angle of contact. The amount of refraction depends on a number of factors, but especially, on the thickness of the glass and specific angle of contact involved. So, the light bends as it passes through the glass, but leaves at its original angle.
The reason for the pole appearing bent when put inside a glass of water is refraction. When a ray of light travels through one medium to the other, it tends to bend or deviate from its original path. Thus a light ray in this case, travels from the air through water, and then again through air and reach the eyes. Thus, the light ray deviates from its original path causing this phenomenon.
The bend given after forming the arrow head, it is very critical bend, wire may fracture during this bend.
Ice will break rather then bend
no , and its not calld 'bend' its called 'reflected' but its like bend but ITS NOT :)
No, a light ray does not bend if it enters a glass block perpendicularly.
by melting them
When the heated glass first begins to sag.
Light could bend when it enters a prism. A prism is a transparent object such as glass.
One should not bend the wiper arms so as to contact all of the glass. Check for proper blade mounting instead. This will contact all of the glass.
It is because the glass has more refractive index than air which makes the light bend more through glass than air.
bend at surface and continued in the same direction in bulk of it...and again bend at emerging surface.........
This is due to the difference in optical density.
To bend glass you need to heat it, bend it, then allow it to cool in a slow and controlled manner. If you're talking about glass beads it's a different story, although the cool slowly still applies.
A glass prism
Light is affected by the media that it travels through. Even air will bend light. Glass and water certainly bend light.