2) Where should the bird clutch a cob of corn so that its return path to the nest is the shortest possible?

 

1) The phenomenon which couldn't be explained by the wave theory of light is:

a) Diffraction

b) Polarization

c) Photoelectric effect

d) Refraction

e) Interference

 

3) A ray of light moves in a medium with the index of refraction equal to 1, and strikes the surface of another medium, whose index of refraction equals 1,41. The angle of incidence is 45.

What is the angle of refraction?

a) 22

b) 27

c) 30

d) 40

e) 42

 

4)The separation of white light into its component colors is called:

a) Reflection

b) Refraction

c) Polarization

d) Interference

e) Dispersion

 

5) The basic elements of the visual experience of an impressionist painting are:

a) color and shape

b) color and light

c) light and shape

 

6) Blind people use:

a) Morse code

b) Braille alphabet

c) blind alphabet

7) The Jewish holiday of light is:

a) Hanukkah

b) Pesah

c) Rosh Ha - Shanah

d) Yom Kippur

Welcome to our quiz!

With every correct answer one of the seven colors of the spectrum will appear at the bottom of the page. Once you have collected all the seven colors the whole spectrum will appear and you will have the honor to meet the members of our team.