• Understanding and measuring wavelengths is an important subject in any physics class.
• The set includes three laser pointers, and each has a different wavelength. The violet laser light has a wavelength of about 445 nanometers. The green laser light has a wavelength of about 532 nanometers. And the red laser light has a longer wavelength of about 650 nanometers. The Laser Pointer Set is a Class II, high-quality product at an affordable price. The batteries are included.
• Caution avoid direct eye exposure.

Understanding and measuring wavelengths is an important subject in any physics class.
The set includes three laser pointers, and each has a different wavelength. The violet laser light has a wavelength of about 445 nanometers. The green laser light has a wavelength of about 532 nanometers. And the red laser light has a longer wavelength of about 650 nanometers. The Laser Pointer Set is a Class II, high-quality product at an affordable price. The batteries are included.