- Visible light is a part of the electromagnetic spectrum
- Visible light can be seen without using equipment
- Therefore, visible light is the part of electromagnetic spectrum that can be seen without using equipment

Hence, visible light is the part of electromagnetic spectrum that can be seen without using equipment
[Question]Which part of the electromagnetic spectrum can humans sense without using equipment or technology?
[Context]- Visible light is a part of the electromagnetic spectrum 
- Visible light can be seen without using equipment