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Why silver bromide is kept in brown bottle?
Silver bromide is kept in a brown bottle to protect it from light exposure. Light can cause silver bromide to degrade, affecting its sensitivity to light and ruining its performance as a light-sensitive material in photographic applications. The brown color of the bottle helps to block out damaging light rays and prevent this degradation from occurring.
What causes a substance to expand?
When a substance is heated, the kinetic energy of its molecules increases, causing them to move faster and further apart. This results in an expansion of the substance's volume. Conversely, when a substance is cooled, the molecules slow down and move closer together, causing the substance to contract.
What is the refractive index of a substance?
The refractive index of a substance is a measure of how much light bends when passing through that substance compared to the speed of light in a vacuum. It is a dimensionless quantity that determines the speed of light in that medium. The higher the refractive index, the slower light travels through the substance.
What is a substance that causes pollution called?
A substance that causes pollution is called a pollutant. Pollutants can be in the form of chemicals, gases, or particles that are harmful to the environment and human health.
Which endogenous substance causes bronchoconstriction?
Histamine is the endogenous substance that causes bronchoconstriction by binding to histamine receptors on smooth muscle cells in the airways, leading to their contraction and narrowing of the airways.
What head injury causes light sensitivity?
a concussion
What are the early symptoms of shingles?
When the virus that causes chickenpox reactivates, it causes shingles. Early symptoms of shingles include headache, sensitivity to light, and When the virus that causes chickenpox reactivates, it causes shingles. Early symptoms of shingles include headache, sensitivity to light, and
What are some of the causes of Migraines?
Migraines can come about for almost any reason. These include stress, light sensitivity, sound sensitivity, and hunger. They also can be caused by genetics.
Malnutrition causes what eye problems?
Visual disturbances include night blindness and increased sensitivity to light and glare.
When a substance transmits no light?
When a substance transmits no light, it means that the substance absorbs all the light that comes in contact with it, preventing it from passing through. This could be due to the substance's molecular structure or composition, which causes it to absorb all wavelengths of light rather than allowing them to pass through.
What causes light and sound sensitivity during migraines?
Light and sound sensitivity during Migraine is caused by the neurological processes of the attack. Increased pressure is not related to Migraine and in fact is another headache disorder called Intracranial Hypertension._____________________________________________Increased pressureBlood vessels are expandig and increasing intracranial pressure which affects certain cranial nerves which leads to pain and increased light/sound sensitivity.
How do you set the sensitivity of a light dependent resistor?
using a variable resistor we can adjust the sensitivity of a light dependent resistor
What is the difference between and allergy and an allergen?
Being exposed to something your allergic to can potentially cause you to be sick. Being sick is your body's way of slowing down your cognitive functions, so that it can focus on getting rid of the thing that is making you sick.Example: If you are allergic to peanuts, and you eat one, there is a high chance that you will be sick.
Which describes a substance with a high index of refraction?
Silicon, with an index of 3.96, is the lowest I could find.
Susan was both nyctophobic and photophobic.What were Susan's fears.?
She was afraid of both darkness and light. Although, medically speaking, photophobia is not an actual phobia. It's sensitivity to light, as when light actually causes your eyes to hurt, causing a reflexive aversion to light and light sources.
What describes a substance with a high index of refraction?
A substance with a high index of refraction bends light more than a substance with a low index of refraction. It indicates that light travels more slowly in that substance compared to air or a vacuum. This property is used in optics for lenses and other optics applications.
Unusual intolerance and sensitivity to light is?
Photophobia
