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£23.65
per pillowcase
Gravitational Blueshift Pillowcase
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Standard
Set Size
Single Pillowcase
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About This Design
Gravitational Blueshift Pillowcase
A multi-coloured, fractal representation of gravitational blueshifting; the shifting of light towards the blue end of the spectrum that occurs as photons become more energetic when falling into a gravity well. Unlike the more commonly known Doppler blueshift, an apparent effect which is the result of motion towards the observer, gravitational blueshift is real, independant of the received angle of the photon. Gravitational blueshift is a natural consequence of conservation of energy and mass-energy equivalence.
Customer Reviews
4.9 out of 5 stars rating217 Total Reviews
217 Reviews
Reviews for similar products
5 out of 5 stars rating
By J.15 January 2024 • Verified Purchase
Single Pillowcase, Standard Size
Zazzle Reviewer Program
I'd really recommend this pillow case. I have black duvet covers and wanted to add some colour. These do the trick perfectly, The colours are really vibrant and I was impressed with the quality of the fabric. Print quality is excellent, 5 stars!
5 out of 5 stars rating
By Toni B.17 January 2018 • Verified Purchase
Single Pillowcase, Standard Size
Zazzle Reviewer Program
Quality is lovely, My Husband is in Hospital a lot and thought this would be nice to have with him. Print was at a high standard
5 out of 5 stars rating
By Greg R.19 February 2020 • Verified Purchase
Single Pillowcase, Standard Size
Zazzle Reviewer Program
My girlfriend nearly cried when she opened the package. Very custom and from the heart.
I will order more. The printing is beautiful! And the pillowcase fabric is high quality. Very impressive.
from zazzle.com (US)
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Product ID: 256492617500504059
Created on 30/07/2015, 20:26
Rating: G
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