\_\_\_\_\_ relied on the outdoor use of sunlight/daylight to expose light sensitive paper. photograms were able to be created in a darkroom, first with an oil lamp and then an electric bulb.
please help, whats the blank
early photographers relied on the outdoor use of sunlight/daylight to expose light sensitive paper. photograms were able to be created in a darkroom, first with an oil lamp and then an electric bulb.
(a) the candidate was studying the effect/importance of sunlight on the rate of photosynthesis.explanation: the candidate had covered one part of the leaf to study the rate of photosynthesis in the absence of sunlight. the candidate would compare it with the rate of photosynthesis on the uncovered parts of the leaf and thus, determine the role of sunlight during photosynthesis.(b) yes, the uncovered portion of the leaf of the potted plant is used as the control here.explanation: the control is used to compare the results which will be obtained after the experiment with the covered portion of the leaf to obtain conclusions.(c) plant was kept in the dark before the experiment, to remove the starch present in the leaf, to the storage organs.explanation: destarching is done by placing the plant for 24-48 hours in darkness before starting the experiment. this is done to make sure that all starch has been formed under experimental conditions only.(d) 1) first, the candidate would have dipped the prepared leaf in boiling water to kill the leaf cells.2) then he would have boiled the leaf in methylated spirit to remove the chlorophyll.3) the leaf would have then been placed in hot water to soften it.4) he would have placed it in a dish and poured iodine solution. the presence of starch is confirmed in regions that turn bluish-black in colour.the uncovered portion of the leaf would have turned bluish black and the cover region would have turned brown in colour.explanation: the uncovered portion of the leaf would have turned bluish black as starch would have formed in those regions. sunlight activates the chlorophyll, which in turn catalyzes the photosynthesis reaction. in the covered portion, on which sunlight could not have penetrated, the region turns brown due to the absence of chlorophyll. this implies that photosynthesis would not have taken place on the covered portion of the leaf. Photography is the process of making pictures (graph) using light (photo)...  
Light takes the most important role on produce nice pictures  
  
There`re no fixed rules about photography, it`s an art so nobody have rights to say that the photo is good or bad...  
  
During rainy day, you should prepare camera`s water-proof jacket or an umbrella to protect it against water. Some expensive cameras have been equipped with water-proof material. hi,
litmus paper is made by dipping filter paper in a dye this dye
is responsible for the change in colour when acid or base is
allowed to react with it i honestly thought it was a bit drying. think it's because it's so heavily frangranted. i will stick to my biolage matrix! good luck. on some cameras, there is a setting in the menu screen to adjust the brighness of the screen. i would also suggest just using the viewfinder to take pictures as well. trueexplanation: physical balance is very sensitive and used in labs for measuring. it is similar to beam balance. it can measure small differences in mass up to milligram. A thunderstorm with lots of lighting, wind, and thunder. I suggest you start with Learning how to use Lightroom Classic. You can do that by viewing some of the Adobe supplied Tutorials.


 


<https://helpx.adobe.com/lightroom-classic/tutorials.html> ![](https://s3mn%20mnimgs%20com/img/shared/discuss_editlive/2191102/2012_01_06_16_34_59/high%20bird%20png)
conditions for the formations of shadows are
1 a light source, an opaque obstacle, a screen
2 umbra, that is the dark part (shown in the above figure by the
dark triangular shape) of the shadow must fall on the screen @derek higgs interesting, mine lights up the kitchen like daylight normally! thanks for this, if you go into settings, there’s a setting called backlight which has options on or 1 min; i cahnged mine to 1 min, just nipped downstairs (at 12:02 am) and the kitchen is in darkness! i’m unsure when it went off but if you change the backlight to “on” it will light up all night. peter