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g100num [7]
3 years ago
11

The coloring of the blue morpho butterfly is protective. As the butterfly flaps its wings, the angle at which light strikes the

wings changes. This causes the butterfly’s color to change and makes it difficult for a predator to follow. This color change is because
A. A diffraction pattern appears only at certain angles.
B. The index of refraction of the wing tissues changes as the wing flexes.
C. The motion of the wings causes a Doppler shift in the reflected light.
D. As the angle changes, the differences in paths among light reflected from different surfaces change, resulting in constructive interference for a different color.
Physics
1 answer:
timurjin [86]3 years ago
8 0

Answer:

D. As the angle changes, the differences in paths among light reflected from different surfaces change, resulting in constructive interference for a different color.

Explanation:

The color of body of butterfly is not due to pigment . It is due to optical effect called interference . The same phenomenon is responsible for coloration of films of oil on water or soap bubble etc. Here interference is caused by multiple slits . As the angle changes, the differences in paths among light reflected from different surfaces change, resulting in constructive interference for a different color.

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Five different forces act on an object. Is it possible for the net force on the object to be zero?
bazaltina [42]
No because there must be an even # if their is an even amount one of the forces isn’t being cancelled
4 0
3 years ago
A drop of oil of volume 10m it spread out on water to make a circular firm of radius 10m calculate the tickness of the firm
Effectus [21]

Answer:

h = 3.1 cm

Explanation:

Given that,

The volume of a oil drop, V = 10 m

Radius, r = 10 m

We need to find the thickness of the film. The film is in the form of a cylinder whose volume is as follows :

V=\pi r^2 h\\\\h=\dfrac{V}{\pi r^2}\\\\h=\dfrac{10}{\pi \times 10^2}\\\\h=0.031\ m\\\\h=3.1\ cm

So, the thickness of the film is equal to 3.1 cm.

8 0
3 years ago
The second-order decomposition of hi has a rate constant of 1.80 x 10−3 m−1 s−1. How much hi remains after 45.6 s if the initial
zlopas [31]

Answer:

2.9 M

Explanation:

The concentration-time equation for a second order reaction is:

1/[A] = kt + 1/[A°]

Where,

A = concentration remaining at time, t

A° = initial concentration

k = rate constant

1/[A] = (1.80 x 10^-3) * (45.6) + 1/3.81

1/[A] = 0.345

= 1/0.345

= 2.9 M.

6 0
3 years ago
In a certain time period a coil of wire is rotated from one orientation to another with respect to a uniform 0.38-T magnetic fie
juin [17]
<h2>The emf produced is 7.2 V</h2>

Explanation:

When coil is placed in the magnetic field , the flux attached with it can be found by the relation . Flux Ф = the dot product of magnetic field and area of coil .

Thus Ф = B A cosθ

here B is magnetic field strength and A is the area of coil .

The angle θ is the angle between coil and field direction .

When coil rotates , the angle varies . By which the flux varies . The emf is produced in coil due to variation of flux . The relation for this is

The emf produced ξ = - \frac{d\phi}{dt} =  B A sinθ \frac{d\theta}{dt}

Now in the given problem

5 = 0.38 x A x \frac{d\theta}{dt}                            I

Now if the magnetic field is 0.55 T and all the other terms are same , the emf produced

ξ = 0.55 x A x \frac{d\theta}{dt}                              Ii

dividing II by I , we have

\frac{\xi}{5} = \frac{0.55}{0.38} = 1.45

or ξ = 7.2 V

6 0
3 years ago
Please help with problem it is much appreciated
Ray Of Light [21]

a. linear pairs, when added together, the angles will make 180 degrees, or a straight line. In this case No, for when you combine the two angles, it is not a straight line

b. False. Vertical angles make two opposite angles that are congruent

c. True. When added together, angles 1 and 4 make a straight line

d. False. As stated for question b, the two opposite angles must be congruent

hope this helps

8 0
4 years ago
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