![IGCSE Centre [official] » What kind of calculator is acceptable for use in Cambridge IGCSE Mathematics examinations? IGCSE Centre [official] » What kind of calculator is acceptable for use in Cambridge IGCSE Mathematics examinations?](https://www.igcsecentre.com/wp-content/uploads/2021/02/Calculator.png)
IGCSE Centre [official] » What kind of calculator is acceptable for use in Cambridge IGCSE Mathematics examinations?
![Circadian Stimulus Calculator 2.0 from LHRC — LED professional - LED Lighting Technology, Application Magazine Circadian Stimulus Calculator 2.0 from LHRC — LED professional - LED Lighting Technology, Application Magazine](https://www.led-professional.com/all/circadian-stimulus-calculator-2-0-from-lhrc/@@download/image/LHRC-15092021.png)
Circadian Stimulus Calculator 2.0 from LHRC — LED professional - LED Lighting Technology, Application Magazine
![Is this calculator allowed for 0580? And if yes, is there any official proof of it? My school won't let me use for some odd reason, and I can genuinely do nothing Is this calculator allowed for 0580? And if yes, is there any official proof of it? My school won't let me use for some odd reason, and I can genuinely do nothing](https://preview.redd.it/is-this-calculator-allowed-for-0580-and-if-yes-is-there-any-v0-uo0fvnu3o5m81.jpg?width=640&crop=smart&auto=webp&s=fc8a907092c3a701d7a3a083743297e7383a7627)
Is this calculator allowed for 0580? And if yes, is there any official proof of it? My school won't let me use for some odd reason, and I can genuinely do nothing
![File:Plot of CIE gray-scale calculation for self-luminous devices, for optotype E subtending 10 arc minutes.svg - Wikipedia File:Plot of CIE gray-scale calculation for self-luminous devices, for optotype E subtending 10 arc minutes.svg - Wikipedia](https://upload.wikimedia.org/wikipedia/en/thumb/9/9c/Plot_of_CIE_gray-scale_calculation_for_self-luminous_devices%2C_for_optotype_E_subtending_10_arc_minutes.svg/1200px-Plot_of_CIE_gray-scale_calculation_for_self-luminous_devices%2C_for_optotype_E_subtending_10_arc_minutes.svg.png)
File:Plot of CIE gray-scale calculation for self-luminous devices, for optotype E subtending 10 arc minutes.svg - Wikipedia
![A summary diagram of the CIE color calculation methodology. Calculated... | Download Scientific Diagram A summary diagram of the CIE color calculation methodology. Calculated... | Download Scientific Diagram](https://www.researchgate.net/publication/235604154/figure/fig4/AS:601710615605259@1520470398916/A-summary-diagram-of-the-CIE-color-calculation-methodology-Calculated-color-coordinates.png)