waves gizmo practice

what color is produced when red light is added to green light?

• magenta

• cyan

• yellow

• white

edwin hubble made the observation that the spectra of distant galaxies is red-shifted, what does this prove?

• the universe is curved

• the universe is contracting

• the universe is unchanging

• the universe is expannding

in which seismograph is the time probe placed at the beginning of the s wave?

• seismograph a

• seismograph b

• seismograph c

• seismograph d

a student wants to know if girls have faster reaction times to visual stimuli than boys. which of the following variables should be the same in all tests?

• the gender of the person taking the test

• the color of the object used in the test

• neither a nor b

• both a and b

what two pigments produce the color black?

• magenta and green

• cyan and yellow

• magenta and yellow

• magenta and cyan

which of the following is not a primary color of light?

• red

• blue

• yellow

• green

what is true about this image?

• some light is reflected and some refracted

• all light is refracted

• all light is reflected

• none of the light is refracted

what could you do to make the beam of light from the laser refract less as it exits the prism?

• use red light with longer wavelength

• increase the index of refraction of the prism

• use blue light with a shorter wavelength

• none are correct

which recording would represent what would happen in the picture below?

• 
• 
• 
• 

when all frequencies of light are reflected, what color results?

• black

• white

• cyan

• red