Of the colors in the visible spectrum, red has the lowest frequency and the longest wavelength. As you move on up the spectrum, wavelengths get shorter. Red has the longes â¦ t spectrum of all visible light. But infrared is even longer and there are many more colors but you can't see them.
1 The average age of patients diagnosed with skin cancer is dropping, from 50 to 40 years old. 2  Approximately 75 percent of damage to your skin from the sun happens by the time you are 20 years old. 3  More than 90 percent of all skin cancer cases are due to overexposure to sunlight.
There are three main types of skin cancer: basal cell carcinoma, squamous cell carcinoma and malignant melanoma. This section is about the two most common types of skin cancer: basal cell carcinoma and squamous cell carcinoma. These are known as non-melanoma skin cancer.