0
What is the advantage of using prisms in a periscope rather than plane mirrors?
Wiki User
∙ 13y ago
A bathroom mirror has a reflective film (usually sputtered silver) applied to its rear surface. Unfortunately rear reflective surface mirrors produce slight double images since a small amount of light reflects off of the front surface of the glass in addition to the light reflected off of the silver on the rear glass surface. A front surface mirror has a reflective film (usually an extremely thin layer of vacuum deposited aluminum) applied to the front surface of the glass.
The problem with the above types of mirrors is that salt water is corrosive to metals. Salt water exposure would quickly eat away at the silver or aluminum coatings which create the reflection in the above types of mirrors. So instead periscopes use right angle glass prisms since right angle glass prisms inherently produce an internal reflection, since no metal film is needed in order to create this internal reflection, and since the glass is very resistant to corrosion from salt water.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoif the angle of incidence is less than the critical angle, the beam of light reflects. the critical angle in glass is about 42 degrees, so when the beam of light hits the side of a 45 degree prism, the beam reflects down. this happens again at the bottom. this is called total internal reflection, which means 100% of the light is reflected, whereas some is absorbed by the mirrors. hope this helps(:
Wiki User
∙ 9y agoMirrors can also be used, but
1. reflection efficiency 95% at similar cost of manufacturing
2. can distort , cause fuzzy and dim images.
Wiki User
∙ 10y agoi dont know either
Add your answer:
Earn +20 pts
What might be an advantage of collecting evidence in a natural setting rather than in a lab?
In a natural setting, you can observe how whatever you are testing occurs on an everyday basis, where as in a lab, there is a chance the data could be corrupted by artificiality.
What substance will break rather than bend?
Ice will break rather then bend
When asking a question should you use the word weather or rather?
For example: would you rather do _____ or ______?
Why is solar power considered to be not harmful to the environment?
Basically all living things on Earth live on Solar Power (the energy from sunlight). Plants use this energy in Photosynthesis to make Sugars and it is this Sugar that is the basis of the food chain. So the environment itself includes solar power. Man has also been able to collect sunlight using mirrors and or PV systems to generate electricity. The advertisement is that doing this is not harmful to the environment because the electricity comes from the sunlight rather than by burning fossil fuels. HOWEVER, one should examine this claim with care, the Mirrors and PV systems (wires, transformers etc) all take fossil fuel to make and their use (except on house roofs an in barren desert areas) takes away the sunlight that plants need to grow. So the claim that solar power is not harmful to the environment is FALSE - it is just perhaps less harmful that burning fossil fuels.
When is workout considered aerobic workout?
when energy is derived from oxygen in air being breathed in, rather than from oxygen already dissolved in the blood (or rather, bound to haemoglobin in the blood). I.e. a longer-term exercise like jogging, rather than a sudden surge of activity like a sprint.
What these are used for binoculars?
Binoculars are distinguished from telescopes through the use of "folded optics". That is, the light path is folded into the body, allowing a compact design. Rather than mirrors, prisms are used to reflect the light.
Which telescope uses a simple light path?
A refracting telescope uses the most direct light path, relying on lenses (rather than prisms and mirrors) to provide a focused image of the night sky.Its opposite would be the reflecting telescope.
How are pyramids and cones different than prisms and cylinders?
They depend on radius rather than perimeter.
Give an example where corrosion is an advantage rather than a disadvantage?
Aluminium oxide is an example of corrosion of advantage rather than disvantage
Give an example where corrosion is an advantage rather than a disadvantage.?
Aluminium oxide is an example of corrosion of advantage rather than disvantage
Would rather reflect than refract light?
Mirrors and other shiny surfaces.
How much heat loss from muscle be an advantage for to humans rather than a disadvantage?
For heat loss to be an advantage to humans rather than a disadvantage, the heat lost must be equal to that produced.
What does the Bar Mirrors website offer?
They mainly and rather obviously deal with bar mirrors, but they also deal in other collectibles. They carry illuminated signs, pour mats, and a plethora of new bar-related items.
Did ancient Chinese people have mirrors?
Yes, as did many other ancient peoples including the Greeks, Romans and Egyptians. However, these were often polished smoothed metal mirrors rather than the silvered glass versions we have today.
What advantage did the British have during the battle of the Spanish armada?
They had smaller, faster ships that were a big advantage rather than Spain's ships.
What were Mary Poppins weaknesses?
Her primary weakness is she is rather vain about her looks. She often looks at herself in mirrors and other reflective surfaces.
What is the advantage of loading applications entirely into ram rather than?
RAM is faster
