Contraceptive methods prevent pregnancy by inhibiting conception. Options include hormonal methods like pills, barrier methods like condoms, intrauterine devices, and permanent methods like sterilization. Choosing the right method depends on individual preferences and health considerations.
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Red light has longer wavelengths, making it visible in the spectrum. Starlight, comprising various colors, appears white. Due to atmospheric scattering, stars may appear redder when low on the horizon. These lights offer insights into celestial objects and atmospheric phenomena.