Your parents have just bought you a new Canon digital camera. You wish to show your friends a picture of it, but you have no other cameras in the house. So you decide to stand 1.5 m in front of a flat mirror.
For what distance should you focus your camera lens?
3m
To determine the distance you should focus your camera lens when standing in front of a mirror, you need to understand the concept of image formation in a mirror.
When you look into a mirror, you see a virtual image of yourself that appears to be at the same distance behind the mirror as your actual distance from the mirror's surface. This is known as the virtual image distance.
In this scenario, standing 1.5 m in front of the mirror, the virtual image of your camera formed in the mirror will also be at a distance of 1.5 m behind the mirror's surface. So, the camera's image would appear to be 3 m away from you (1.5 m to the mirror + 1.5 m from the mirror to the virtual image).
To focus your camera lens at this distance, set the focus to 3 meters. This means adjusting the lens to ensure that the camera is focused properly for objects at a distance of 3 meters from the lens. This will help you capture a clear image of your camera in the mirror.
Remember to double-check the camera's focus and experiment with different settings if needed, as camera models may have variations in their focusing mechanisms.