Physics, 31.03.2021 19:10 sammamamam1090
Consider the diagram of the electromagnetic spectrum shown below. Notice the locations of X-rays and radio waves.
X-rays are often used in medical settings to create images of the body's internal structures such as bones. This is made possible by the fact that X-rays are able to pass through the body's softer tissues without being absorbed. Radio waves are also able to pass through the body's softer tissues without being absorbed. Why are radio waves not used to generate medical images?
A. The frequency of most radio waves is too low to allow them to pass through bones or other solid materials.
B. Radio waves tend to bend too much when they encounter solid materials to be used for generating accurate images.
C. Radio waves carry so little energy that they tend to pass through most atoms without an interaction taking place.
D. The electrons in most atoms are not in high enough energy states to absorb the photons of radio waves
Answers: 1
Physics, 22.06.2019 07:00
Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j
Answers: 1
Physics, 22.06.2019 21:30
Contrast the force of gravity between these pairs of objects: 1-kg mass and a 2-kg mass that are 1 m apart; a 1-kg mass and a 2-kg mass that are 2 m apart; and two 2=kg masses that are 1 m apart. i dont understand.
Answers: 3
Physics, 22.06.2019 23:30
Forms of meditation hail from which traditions a ) eastern traditions b ) western traditions c ) eastern and western traditions d ) neither eastern nor western traditions
Answers: 1
Consider the diagram of the electromagnetic spectrum shown below. Notice the locations of X-rays and...
Mathematics, 19.08.2019 23:30
Mathematics, 19.08.2019 23:30
Mathematics, 19.08.2019 23:30
Mathematics, 19.08.2019 23:30
Mathematics, 19.08.2019 23:30