Aray of white light moves through the air and strikes the surface of water in a beaker. the index of refraction of the water is 1.33 and the angle of incidence is 30 degrees. all of the following are true except:

i. the angle of reflection is 30 degrees
ii. the angle of refraction is 30 degrees
iii. total internal reflection will result, depending on the critical angle

except ii and iii

Explanation:

The angle of reflection is the angle to the normal the white rays strikes the water surface and it is the incidence angle. Since the white light is moving from less dense medium to a denser medium or a medium with a higher refractive index; the angle of refraction will be less than 30 degrees. Total internal reflection cannot occur because the white light is traveling from a less dense medium to a denser medium.

d) physical means can be used to separate the components of air.

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.