The phenomenon of total internal reflection of light is used in many optical instruments like telescopes, microscopes, binoculars, spectroscopes, periscopes etc. The brilliance of a diamond is due to total internal reflection. Optical fibre works on the principle of total internal reflection.

Explanation:

thank me later but if it wrong. sorry

8 0

2 years ago

A piece of glass has a thin film of gasoline floating on it. A beam of light is shining perpendicular on the film. If the wavele

kobusy [5.1K]

Answer:

200 nm

Explanation:

We need a constructive interference to see the bright reflection

we know that $2t=m\lambda$ where m=1 and $\lambda$ is the wavelength of the gasoline

so $\lambda =\frac{560}{1.4}=400nm$

putting the value of m and $\lambda$ in thickness equation

$t=\frac{1\times 400}{2}=200nm$

so the thickness of the film will be 200 nm

3 0

2 years ago

All of the following are methods to improve the communication of your key messages EXCEPT:

uysha [10]

Answer:

Fill the slides with images and animations

Explanation:

these will most likely distract the audience

6 0

2 years ago

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Many professional photographers take pictures of people. What skills would someone have to have to be successful in these types

Galina-37 [17]

Wedding photographer
you are taking pictures of large groups of all kinds of people from 2 different sides of a family

could you add me as best answer if this is correct?

7 0

2 years ago