## Why the brightness of the light emitted by a flashlight decreases as the flashlight moves farther away from you?

The farther away the flashlight is moved from the paper, the more squares on the graph paper are illuminated. This means the light is less intense (less power per square meter). The longer the lights are left on, the less power they will output, and the intensity and brightness of the light will decrease.

## Does light intensity increase or decrease with distance?

There is an inverse relationship between distance and light intensity – as the distance increases, light intensity decreases. The light energy at three times the distance away is spread over nine times the area, and so on.

## What is the relationship between distance and light intensity?

There is an inverse relationship between distance and light intensity – as the distance increases, light intensity decreases. This is because as the distance away from a light source increases, light energy becomes spread over a wider area.

## How do you change the intensity?

HOW and WHY to change your exercise intensity!

1. Change the order of the exercises. This way the body has no idea what to expect and it has to respond differently.
2. While keeping proper form, increase the number of reps you are doing in 30-seconds by increasing your speed.

## Why would you not use green light and white light if you wanted to determine?

Why would you not use green light and white light if you wanted to determine the dependence of specific color wavelengths on the rate of photosynthesis? A) Green light contains all visible wavelengths. C) Green is absorbed and used by plants to convert light energy, white is not.

black

## What is the second greatest color of light that chlorophyll a absorbs?

Absorption spectra of the chlorophyll a and b pigments in the visible light range, measured in a solvent. Both types barely absorb green light. Chlorophyll a absorbs violet and orange light the most. Chlorophyll b absorbs mostly blue and yellow light.

## What color of light is absorbed by carotenoids but not by chlorophylls?

Neither a or b absorb green light; because green is reflected or transmitted, chlorophyll appears green. Carotenoids absorb light in the blue-green and violet region and reflect the longer yellow, red, and orange wavelengths.

## What happens to the light that is absorbed by the chlorophyll?

What happens when light is absorbed by a molecule such as chlorophyll? The energy from the light excites an electron from its ground energy level to an excited energy level (Figure 19.7).