19. a) Name the type of Joint present in i) Neck ii) Shoulder b) Which of the skull bones are movable ?

What is happens when a beam of light is traveling through air and is reflected by a glass surface?

DaniilM [7]

When a beam of light is traveling through air and is reflected by a glass surface, then the 2R / (1+R) is the total reflectance through a glass window.

To find the answer, we have to know about reflection.

<h3>What is reflection by glass surface?</h3>

Depending on the angle of incidence, the refractive indices of the glass and the light's source, some light is reflected when it strikes a glass surface (e.g., air).
The Fresnel equations can be used to calculate the percentage of transmitted and reflected light.
Both the front and the rear of glass reflect the light that is traveling through it. In fact, the light may mirror itself several times. Therefore, 2R / (1+R) is the total reflectance through a glass window.
These equations predict that ordinary soda-lime window glass will reflect around 8% of the light, assuming a perpendicular incidence angle and no absorption or scattering.

Thus, we can conclude that, when a beam of light is traveling through air and is reflected by a glass surface, then the 2R / (1+R) is the total reflectance through a glass window.

Learn more about the reflection here:

brainly.com/question/5012638

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7 0

2 years ago

What should a sailboat operator do when approaching a PWC head-on

nekit [7.7K]

In accordance with the International Regulation for the prevention of collisions at sea:

1.- A sailing boat has a passing preference over a motorized boat, except when the motor boat is limited by its draft.

2.- The sailboat must maintain its course and speed.

3.- If it is evident that the PWC does not respond, the sailboat must sound the warning signal, and change its course to starboard.

4.- All actions must be taken as soon as possible.

5.- If a sailboat is using its engine, the situation changes, and in that case, both ships must alter to starboard.

8 0

3 years ago

Represent the following sentence as an algebraic expression, where "a number" is the

agasfer [191]

Answer:

2 (x+3)

Explanation:

8 0

3 years ago

What is the half-life of an isotope if after 30 days you have 31.25 g remaining from a 250 g beginning sample size?

Dima020 [189]

Answer:The time required for half of the original population of radioactive atoms to decay is called the half-life. The relationship between the half-life, T1/2, and the decay constant is given by T1/2 = 0.693/λ.

Explanation:

4 0

2 years ago

Topic: Chapter 19: Some wiggle room

Nana76 [90]

Answer:

4.86 m

Explanation:

Given that,

The frequency produced by a humming bird, f = 70 Hz

The speed of sound, v = 340 m/s

We need to find how far does the sound travel between wing flaps. Let the distance is equal to its wavelength. So,

$v=f\lambda\\\\\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{340}{70}\\\\\lambda=4.86\ m$

So, the sound travel 4.86 m between wings flaps.

3 0

3 years ago

19. a) Name the type of Joint present in i) Neck ii) Shoulder b) Which of the skull bones are movable ?​

19. a) Name the type of Joint present in i) Neck ii) Shoulder b) Which of the skull bones are movable ?