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3 years ago

Why does laser beam might appear blue and another laser beam might appear red?

1 answer:

6 0

One thing about a laser is that the light it puts out is all one single sharp
color (wavelength) of light with no other wavelengths mixed in with it.
That wavelength is a different one for the different kinds of material
that are used to do the "lasing" ... generating the light. There are a
couple of different wavelengths of infrared lasers, and several different
types of lasers in the visible range.

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vredina [299]

Answer:

the vertical acceleration is 9.8 m/s,

downward and no horizontal acceleration..

7 0

3 years ago

Read 2 more answers

A long, cylindrical solenoid with 100 turns per centimeter has a radius of 14.7 cm. If the current through the solenoid changes

oee [108]

Answer:

Explanation:

Given:

dI/dt = 6.21 A/s

n = N/l

= 100 turns/cm

= 100 turns/cm × 100 cm/1 m

Radius, r = 14.7 cm

= 0.147 m

Inductance, L = uo × n^2 × A × l

L/l = 4pi × 10^-7 × (100 × 100)^2 × pi × 0.147^2

= 8.53 H

Emf, E = L × dI/dt

E/l = L/l × dI/dt

= 8.53 × 6.21

= 52.98 V/m

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3 years ago

Since the noble gases are stable (VERY unreactive), oxygen would like to look like one in terms of the number and arrangement of

iogann1982 [59]

Answer:

oxygen gains two electron to attain electron configuration like neon. Oe-²

Explanation:

3 0

3 years ago

A hockey player strikes a puck that is initially at rest. The force exerted by the stick on the puck is 975 N, and the stick is

Anna007 [38]

Explanation:

Given that,

The force exerted by the stick on the puck is 975 N

The stick is in contact with the puck for 0.0049 s

Initial speed of the puck, u = 0 (at rest)

(a) We need to find the impulse imparted by the stick to the puck.

Impulse = Force × time

J = 4.7775 kg-m/s

(b) Mass of the puck, m = 1.76 kg

We need to find the speed of the puck just after it leaves the hockey stick.

Let the speed be v.

As impulse is equal to the change in momentum.

$J=m(v-u)\\\\4.7775=1.67(v-0)\\\\v=\dfrac{4.7775}{1.67}\\\\v=2.86\ m/s$

So, when the puck leaves the hockey stick its speed is 2.86 m/s.

8 0

3 years ago

A rock on earth has a weight of 135 Newtons. What is its mass?

luda_lava [24]

The mass is 13.766 kilograms

8 0

3 years ago