Question

True or False'

1) When an electron's location is measured, it's always found at a single location (not spread out like a wave)

2) People have their best color vision in the center of our field of view, but can detect very low intensity light better slightly off center.

3) A good voltmeter should have low resistance (as low as possible).  

4) Sound waves are longitudinal waves that cannot travel through a vacuum, while light waves are transverse waves that can travel through absolute vacuums.   

Answer 1

(1) yes that's true wave are disturbance , where some needs material for there propagation , but the truth is that waves has negligible mass to hold , that is why it is always travelling in a spread manner .
(2) No , because the color of an image is always given , though the intensity from another source light can alter light wave from entering into the eyes but this does not stop the eyes from producing color. And which our eyes can also determine intensity of light very better because of the photosensitive cells in them.
(3)true, because a voltometer must have low resistance so that it won't alter the measurements of voltage , that's is if the resistance high in the voltage it will also reduce the voltage in the material giving disaccurate result.
(4) true sound wave are longitudinal wave why? Because they travel parallel to the direction of the vibration of the medium.while transverse wave are one which travel perpendicular, an experiment as shown that sound is a mechanical wave and also can't travel in a vacuum that has been tested by bell ringing. But light can, because light attian it maximum speed of 3x10^8m/s when travelling through a vacum