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1 year ago

What is radiation produces a wave full energy.

Physics

1 answer:

Alexeev081 [22]1 year ago

7 0

Answer:

electromagnetic radiation hopefully

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In a physics lab, light with a wavelength of 490 nm travels in air from a laser to a photocell in a time of 17.5 ns . When a sla

Gennadij [26K]

Answer:

196 nm

Explanation:

Given that

Value of wavelength, = 490 nm

Time spent in air, t(a) = 17.5 ns

Thickness of glass, th = 0.8 m

Time spent in glass, t(g) = 21.5 ns

Speed of light in a vacuum, c = 3*10^8 m/s

To start with, we find the difference between the two time spent

Time spent on glass - Time spent in air

21.5 - 17.5 = 4 ns

0.8/(c/n) - 0.8/c = 4 ns

Note, light travels with c/n speed in media that has index of refraction

(n - 1) * 0.8/c = 4 ns

n - 1 = (4 ns * c) / 0.8

n - 1 = (4*10^-9 * 3*10^8) / 0.8

n - 1 = 1.2/0.8

n - 1 = 1.5

n = 1.5 + 1

n = 2.5

As a result, the wavelength of light in a medium with index of refraction would then be

490 / 2.5 = 196 nm

Therefore, our answer is 196 nm

6 0

2 years ago

A car moving at a speed of 10 m/s enters a Q. highway and accelerates at 4 m/s2. How fast will the car be moving after it accele

geniusboy [140]

Initial velocity=u=10m/s
Final velocity=v
Acceleration=a=4m/s^2
Distance=s=60m

According to third equation of kinematics

$\\ \rm\rightarrowtail v^2=u^2+2as$

$\\ \rm\rightarrowtail v^2=10^2+2(4)(60)$

$\\ \rm\rightarrowtail v^2=100+480$

$\\ \rm\rightarrowtail v^2=580$

$\\ \rm\rightarrowtail v\approx 24m/s$

5 0

2 years ago

Concept Simulation 20.4 provides background for this problem and gives you the opportunity to verify your answer graphically. Ho

Evgesh-ka [11]

Answer: t = 0.492τ

Explanation: In a circuit where there is a resistor and a capacitor, the equation for a charging capacitor is given by:

$q = q_0(1 - e^{\frac{t}{RC} })$

where:

$q_0$ is the equilibrium charge

q is the charge at time t

RC is time constant also called τ (tau)

For this problem, the circuit is charged to 39%, which means: q = $0.39 q_0$

$0.39q_0 = q_0 (1 - e^\frac{-t}{RC} )$

0.39 = 1 - $e^\frac{-t}{RC}$

$e^\frac{-t}{RC}$ = 0.61

$\frac{-t}{RC}$ = ln(0.61)

-t = ln(0.61)τ

t = 0.492τ

For the condition to be met it is needed 0.492 time constants must elapse.

7 0

2 years ago

. A telescope is constructed with two lenses separated by a distance of 25 cm. The focal length of the objective is 20 cm. The f

beks73 [17]

Answer:

the magnitude of the angular magnification of the telescope. is 4

Explanation:

Calculate the magnitude of the angular magnification of the telescope.

Given that,

distance = 25cm

focal length from the objective f₀ = 20cm

focal length from eye piece f₁ = 5cm

The angular magnification of the telescope is

$M = \frac{f_0}{f_1}$

Magnification = 20 / 5

magnification = 4

Hence, the magnitude of the angular magnification of the telescope. is 4

5 0

2 years ago

Which of these waves cannot travel in a vacuum?

gayaneshka [121]

Light. The black hole is a vacuum, and not even light can escape it's suction

4 0

2 years ago

Read 2 more answers