Question 1 of 50Light Transmittance
The arrow marked “?” shows light passing through the glass into the room. Which property does it represent?
Glass Selection Learning
50 multiple-choice questions on how facade glass is measured, coated and compared. Pick one option per question. You see right or wrong straight away, with the answer and the reason.
- Light transmittance
- Internal reflection
- External reflection
- U value
- Solar factor
- Magnetron sputtering
- Coating thickness
- Low-E
- Glass comparison
Light Transmittance6 questions
Question 2 of 50Light Transmittance
The bar splits incoming visible light into transmitted, reflected and absorbed parts. Reflected is 20 % and absorbed is 25 %. What is the VLT?
Question 3 of 50Light Transmittance
VLT is calculated only over the shaded band of the graph. What wavelength range does that band cover?
Question 4 of 50Light Transmittance
Which glass in the chart gives the brightest, most daylit interior?
Question 5 of 50Light Transmittance
What happens to the VLT of clear float glass when its thickness increases from 6 mm to 12 mm?
Question 6 of 50Light Transmittance
A showroom wants maximum daylight and true colour of the products seen through the glass. Which glass substrate suits best?
Internal Reflection3 questions
Question 7 of 50Internal Reflection
The arrow marked “?” shows light from inside the room bouncing back into the room from the glass. What is it called?
Question 8 of 50Internal Reflection
In this double glazed unit, which quantity does the arrow marked “?” show?
Question 9 of 50Internal Reflection
At night with the lights on, you see a mirror image of the room instead of the street. Which glass property is high?
External Reflection4 questions
Question 10 of 50External Reflection
The arrow marked “?” is sunlight bouncing back off the outer face of the glass. What is it?
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