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2 years ago

What happens to infrared radiation when it comes to contact wih a shiny suface

2 answers:

8 0

If a surface looks "shiny" to you, that's because it reflects all
or most of the visible light that hits it. That doesn't always mean
that the same surface reflects other, non-visible wavelengths of
light. Infrared radiation may also reflect off of it, and probably
does. But you can't be sure just because it's visibly shiny.

-BARSIC- [3]2 years ago

5 0

If you didn't know, some surfaces are better than others at absorbing and reflecting infrared radiation.If infrared radiation comes in contact with a shiny surface the shiny surface reflects the radiation.(shiny surfaces are the best reflectors). Hope this helps you :D

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The plane of a rectangular coil, 3.7 cm by 3.7 cm, is perpendicular to the direction of a uniform magnetic field B. If the coil

gizmo_the_mogwai [7]

Answer:3.77 T/s

Explanation:

Given

Area of cross-section $=3.7\times 3.7 cm^2=13.69 cm^2$

N=no of turns=61

Resistance= $R=8 \Omega$

current (i)=0.04 A

emf induced $=i\times R=0.04\times 8=0.32 V$

emf induced $e=NA\frac{\mathrm{d} B}{\mathrm{d} t}$

$0.32=62\times 13.69\times 10^{-4}\times \frac{\mathrm{d} B}{\mathrm{d} t}$

$\frac{\mathrm{d} B}{\mathrm{d} t}=\frac{0.32\times 10^4}{848.78}=3.77 T/s$

8 0

3 years ago

The pull of what is weaker when 2 objects are farther apart

9966 [12]

The gravitational pull is weaker.

7 0

3 years ago

A 15 N force and a 45 N force act on in object in opposite directions. What is the net force on the object?

vovikov84 [41]

Answer:

30N in the direction the 45N acts.

Explanation:

Fnet = F1 + F2 (the vector sum of the forces)

Assigning a positive direction to the 45N force and a negative direction to the 15N force gives:

Fnet = 45 - 15

Fnet = 30N

Since the answer is positive, it is in the direction the 45N force acts.

7 0

2 years ago

100 N

weqwewe [10]

Answer:

The force required to move the cart is divided by three or 33.33 N.

Explanation:

8 0

2 years ago

Read 2 more answers

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wave

Llana [10]

Explanation:

It is given that,

The thinnest soap film appears black when illuminated with light with a wavelength of 535 nm, $\lambda=5.35\times 10^{-7}\ m$

Refractive index, $\mu=1.33$

We need to find the thickness of soap film. The soap film appear black means there is an destructive interference. The condition for destructive interference is given by :

$2t=m\dfrac{\lambda}{\mu}$