Which of the following is NOT true about light waves?

1. Heat from the sun is a type of light wave
2. Human eyes can only see a limited range of light waves
3. All light waves have the same frequency
4. Light waves come in a spectrum of wavelengths

What is the fate of the electrons that interact with a specimen in an electron microscope?

While you are driving in the lane next to the curb on a multi-lane road the car on your left suddenly moves toward you lane. they are about toy crash into your front fender. you

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)