Lidia plans an experimental investigation to see how the thickness of a lens affects the point where a beam of light is focused. she plans to shine light through a lens and measure the distance to a screen that is placed where the beam focuses. what are the controls in lidia’s investigation? the material and thickness of the lens the type of light and the material of the lens the distance to the screen and the type of light the thickness of the lens and the distance to the screen

option b)

Explanation:

the correct answer is option b)

The controls in lidia's investigation is the type of light and the material of the lens.

When we talk about the focus of the light by lens it is independent of the the thickness of the lens.

It does not depends on the thickness of the lens.

It depend on the type of light, light with higher wavelength  will focus will be at large distance vice versa.

hi,

what occurs during a solar eclipse?

there are small tides across earth.

the moon is between earth and the sun.

p.s. im not sure if the first answer is correct because during a solar ecliphse there are spring tides and i dont know if they are the same.