Okay, let's try to educate you a little bit kiddo since you seem to be actually stupid here.

Let's go simpler to really point out how retarded you are for this:

Curtains. Blackout curtains are designed to block all rays, and can turn a room pitch black. Most other curtains allow light through, which you can easily see on a sunny day by the illumination through said curtains.

By adding separate layers and tightening the knit, you can go from seeing the light to blocking it entirely.

SPF 100 clothing is specifically designed to prevent light from getting through. Normal clothes are not.

It's LITERALLY that simple. Light is not a magical conspiracy theory. It exists. We understand how it works. We can only see because light bounces off of surfaces in all directions until it reaches our retina.

Edit for transparent redactions of my toxicity. It's better to admit when you're wrong and own it than try to hide it behind edits.

Okay, let's try to educate you a little bit kiddo since you seem to be actually stupid here.

Let's go simpler to really point out how retarded you are for this:

Curtains. Blackout curtains are designed to block all rays, and can turn a room pitch black. Most other curtains allow light through, which you can easily see on a sunny day by the illumination through said curtains.

By adding separate layers and tightening the knit, you can go from seeing the light to blocking it entirely.

SPF 100 clothing is specifically designed to prevent light from getting through. Normal clothes are not.

It's LITERALLY that simple. Light is not a magical conspiracy theory. It exists. We understand how it works. We can only see because light bounces off of surfaces in all directions until it reaches our retina.