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3 years ago

The amount of power has decreased. This is most likely the result of less work being done over a longer period of time.

Physics

2 answers:

Oxana [17]3 years ago

8 0

The first option is the most correct.

melisa1 [442]3 years ago

3 0

Answer:

Option (A)

Explanation:

Power is defined as the rate of doing work.

The work done in unit time is defined as the power.

The formula for the power is given by

$Power = \frac{Work}{Time}$

Power is a scalar quantity and its SI unit is Watt.

As the power is decreased, either work is decreased or time is increased.

So, if a less work is done in a longer period of time, the power is decreased.

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ololo11 [35]

Answer:

Explanation:

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3 years ago

Coherent, monochromatic light is incident on a pair of slits that are 0.3 mm apart. When light passes through the slits and stri

ladessa [460]

Answer:

550 nm

Explanation:

The formula for the double-slit diffraction experiment is:

$y=\frac{m\lambda D}{d}$

where

y is the distance of the m-th maximum from the central fringe

$\lambda$ is the wavelength of the light used

D is the distance of the screen from the slits

d is the separation between the slits

In this problem we have:

$d=0.3 mm = 0.3\cdot 10^{-3} m$ is the distance between the slits

$D=1.5 m$ is the distance of the screen

We also know that the distance between the 3rd and 5th order maximum is 5.5 mm, which means that:

$y_5-y_3 = 5.5 mm = 5.5\cdot 10^{-3} m$

And we can rewrite this as:

$y_5-y_3 = \frac{5\lambda D}{d}-\frac{3\lambda D}{d}=\frac{2\lambda D}{d}$

where we used respectively m=3 and m=5. If we know solve for $\lambda$ , we find the wavelength:

$\lambda = \frac{(y_5-y_3) d}{2 D}=\frac{(5.5\cdot 10^{-3})(0.3\cdot 10^{-3})}{2(1.5)}=5.5 \cdot 10^{-7} m=550 nm$

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3 years ago

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