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3 years ago

Which material reflects the most light transparent, translucent, or opaque?

1 answer:

6 0

There's no rule like that. A glass mirror is opaque but reflects
more light than a clean transparent glass window does.

On the other hand, a material that's transparent but shiny may
reflect more light than an opaque material that's painted black.

You can't give any general rule.

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A convex lens has a focal length of 16.5 cm. Where on the lens axis should an object be placed in order to get a virtual, enlarg

alexandr402 [8]

Answer:

Object should be placed at a distance, u = 7.8 cm

Given:

focal length of convex lens, F = 16.5 cm

magnification, m = 1.90

Solution:

Magnification of lens, m = - $\frac{v}{u}$

where

u = object distance

v = image distance

Now,

1.90 = $\frac{v}{u}$

v = - 1.90u

To calculate the object distance, u by lens maker formula given by:

$\frac{1}{F} = \frac{1}{u}+ \frac{1}{v}$

$\frac{1}{16.5} = \frac{1}{u}+ \frac{1}{- 1.90u}$

$\frac{1}{16.5} = \frac{1.90 - 1}{1.90u}$

$\frac{1}{16.5} = \frac{ 0.90}{1.90u}$

u = 7.8 cm

Object should be placed at a distance of 7.8 cm on the axis of the lens to get virtual and enlarged image.

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3 years ago

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3 years ago

A geologist sees a fault along which blocks of rock in the footwall have moved higher relative to blocks of rock in the hanging

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Answer: Normal fault

Explanation:

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