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PilotLPTM [1.2K]
3 years ago
11

I need some help with these two, im really struggling with them.

Physics
2 answers:
MatroZZZ [7]3 years ago
7 0

Answer:a)magnification means the ratio of image distance to object distance i.e

Explanation:

q/p=-2.5

Which means q=-2.5p

Or we can write

Image height (I)over object height (O)

I/O =-2.5

I =-2.5(O)

Which means image is greater by 2.5 times than object and negative sign shows that mirror is convex

Lisa [10]3 years ago
5 0

Answer:

In optics, a magnification refers to the process of enlarging the apparent size of an object, not the physical one, you can call it the virtual size of the object.

Specifically, magnification refers to the number as such, if it's less than one, it refers to a reduction size, which can also be called de-magnification.

For example, a convex lens make things look bigger, there's involved the magnification concept. Another popular example is a microcoscope, which makes small things to look bigger.

So, in this case, a maginification of -2.5 refers to de-magnification, because -2.5 < 1. Basically, the mirror will make objects seem smaller than the real one.

On the other hand, chromatic aberration occurs when a mirror is not able to bring all wavelengths colors into the same plane or focal point, that's why the image seems like distiorted.

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3 years ago
Which of the following accurately describe some aspect of gravitational waves? Select all that apply.
steposvetlana [31]
<h2>Answers:</h2>

-The first direct detection of gravitational waves came in 2015

-The existence of gravitational waves is predicted by Einstein's general theory of relativity

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<h2>Explanation:</h2>

Gravitational waves were discovered (theoretically) by Albert Einstein in 1916 and "observed" for the first time in direct form in 2015 (although the results were published in 2016).  

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3 years ago
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wlad13 [49]

Answer:

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Explanation:

In the given question,

distance above surface= 2 m

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Since the swimming pool is filled with water and atmosphere has air therefore the refractive index phenomenon will occur.

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= 6 m

therefore, real depth =  4/3 x apparent depth

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