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3 years ago

Why is the sky blue?

1 answer:

Taya2010 [7]3 years ago

4 0

A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.

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A diffraction grating has 300 lines per mm. If light of wavelength 630 nm is sent through this grating, what is the highest orde

True [87]

Answer:

The order of maximum is $n = 5$

Explanation:

From the question we are told that

The diffraction grating is k = 300 lines per mm = 300000 lines per m

The wavelength is $\lambda = 630 \ nm = 630 *10^{-9} \ m$

Generally the condition for constructive interference is mathematically represented as

$dsin \theta = n * \lambda$

Here n is the order maximum

d is the distance the grating which is mathematically represented as

$d = \frac{1}{k}$

=> $d = \frac{1}{300000}$

=> $d = 3.3*10^{-6}\ m$

$n = \frac{dsin \theta}{ \lambda}$

at maximum $sin\theta = 1$

$n = \frac{d}{\lambda}$

=> $n = \frac{3.3*10^{-6}}{630 *10^{-9}}$

=> $n = 5$

8 0

3 years ago

Why would it be useful for a house to have sound-absorbing materials in the walls

klio [65]

Hey,

i am here to help you................

The house needs sound absorbing materials in the walls so that reveberation dosen't happens and can here clearly what people will be saying in the house

It is also used in cinema halls also

I believe that this answer was heplful.

7 0

3 years ago

A car driving around a track is an example of projectile motion.<br> a. True<br> b. False

Degger [83]

the answer is.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................<u>FALSE.</u> You are welcome everybody :) GOod luck to all of you people. Peace love and coconut oil ॐ

5 0

3 years ago

Read 2 more answers

Type the correct answer in the box. Spell all words correctly.

belka [17]

Answer: marine current

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3 years ago

There are 15 water molecules in the air, and the relative

AlexFokin [52]

30 30 30 30 30 30 30 30 30 30

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2 years ago