In the radio spectrum, higher frequencies attenuate faster. Also, in my understanding, higher frequencies travel more along line of path. Lower frequencies can penetrate through solid materials but higher frequencies cannnot (it depends upon the structure since light can travel through glass too)

1. Why is then we can see starlight. why doesn't it attenuate. Why laser light can travel longer distance?

2. GPS signals 1000-1500MHz range doesn't seem to work indoors but cell phone signal 1800/900 MHz works? Why is that? I think maybe because GPS signals travel for 12000 km so they maybe very weak already. Also you require more than 4 strong signals. Is that right?

In the radio spectrum, higher frequencies attenuate faster. Also, in my understanding, higher frequencies travel more along line of path. Lower frequencies can penetrate through solid materials but higher frequencies cannnot (it depends upon the structure since light can travel through glass too)

Why is then we can see starlight. why doesn't it attenuate. Why laser light can travel longer distance?

In the radio spectrum, higher frequencies attenuate faster. Also, in my understanding, higher frequencies travel more along line of path. Lower frequencies can penetrate through solid materials but higher frequencies cannnot (it depends upon the structure since light can travel through glass too)

1. Why is then we can see starlight. why doesn't it attenuate. Why laser light can travel longer distance?
2. GPS signals 1000-1500MHz range doesn't seem to work indoors but cell phone signal 1800/900 MHz works? Do cell phone signals Why is that? I think maybe because GPS signals travel for 12000 km so they maybe very weak already. Also you require more than 4 strong signals. Is that right?

In the radio spectrum, higher frequencies attenuate faster. Also, in my understanding, higher frequencies travel more along line of path. Lower frequencies can penetrate through solid materials but higher frequencies cannnot (it depends upon the structure since light can travel through glass too)

1. Why is then we can see starlight. why doesn't it attenuate. Why laser light can travel longer distance?

2. GPS signals 1000-1500MHz range doesn't seem to work indoors but cell phone signal 1800/900 MHz works? Why is that? I think maybe because GPS signals travel for 12000 km so they maybe very weak already. Also you require more than 4 strong signals. Is that right?