New Delhi, May 3: The sun is the most vital source of life on Earth. It not only provides light but also serves as the primary source of energy for plants and humans. However, its rays are not always beneficial; intense sunlight can damage the skin, leading to issues like sunburn. This raises the question: why does sunlight burn our skin? Every year on May 3, International Sun Day is celebrated to raise awareness about the sun’s significance and its effects.
Sunlight is essential for health. It helps produce vitamin D, which is crucial for bone health, but maintaining balance is key. Prolonged sun exposure can increase the risk of skin cancer. On International Sun Day, we should understand both the benefits and harms of sunlight.
The sun emits various types of energy towards the Earth. There are three main types of rays: infrared radiation (heat), visible light, and ultraviolet (UV) light. We cannot see UV rays, but they can harm our skin.
The sun constantly sends out energy waves known as electromagnetic waves. Infrared waves are the least energetic and longest, providing warmth. Visible light has medium energy, while ultraviolet rays carry the highest energy. It is these UV rays that cause skin burns. When excessive UV rays hit the skin, they damage skin cells. The cells start to die, prompting a response from the body. Consequently, the skin becomes red, swollen, painful, and irritated, which is known as sunburn.
Notably, UV rays can reach us everywhere. Sunburn does not only occur in direct sunlight. UV rays can bounce off water, snow, concrete, and sand. This means you can still get sunburned while sitting under an umbrella. These rays can also penetrate through clouds, so caution is necessary even on cloudy days.
Health experts recommend several measures to prevent sunburn. Avoid direct sunlight from 10 AM to 4 PM. Wear light-colored clothing that covers the entire body. Use wide-brimmed hats and sunglasses. Apply sunscreen with an SPF of 30 or higher, reapplying every 3-4 hours. Stay hydrated by drinking plenty of water. Doctors advise using cold water compresses for sunburn and applying moisturizer. In more severe cases, consult a physician.
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