Spacecraft i, containing students taking a physics exam, approaches the earth with a speed of 0.620c (relative to the earth), while spacecraft ii, containing professors proctoring the exam, moves at 0.260c (relative to the earth) directly toward the students. the professors stop the exam after 52.0 min have passed on their clock.

Matter that emits no light at any wavelength is called

State the below theories and give the name of the writer of the theory 1. wave theory 2. quantum theory 3. corpuscular theory 4. electromagnetic theory

Which of the following statements comparing electron microscopy and light microscopy is false? which of the following statements comparing electron microscopy and light microscopy is false? both the electron microscope and the light microscope use the same wavelengths for illumination. images produced by light microscopes can be in color, whereas electron microscope images are black and white unless they are artificially colored. the electron microscope has greater resolution than the light microscope. electron microscopes can allow examination of viruses and internal cell structures, whereas light microscopes are limited to objects that are 0.5 micrometers and larger. request answer