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WAS THE SEA ALWAYS BLUE?
September 2025
|BBC Science Focus
Our planet has had an ocean for around 3.8 billion years, but new research suggests it hasn't always been blue.
Away from coastal areas, the sea today is blue because of the way water absorbs longer wavelengths of sunlight towards the red end of the spectrum. This leaves the shorter, bluer wavelengths to penetrate deeper, scattering and reflecting back into our eyes.
هذه القصة من طبعة September 2025 من BBC Science Focus.
اشترك في Magzter GOLD للوصول إلى آلاف القصص المتميزة المنسقة، وأكثر من 9000 مجلة وصحيفة.
هل أنت مشترك بالفعل؟ تسجيل الدخول
المزيد من القصص من BBC Science Focus
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