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4 years ago

Why do scientists believe that light is made of streams of particles?

2 answers:

8 0

Scientists believe that light is made of streams of particles because light exhibits the particle nature. This can be explained on the basis of photoelectric effect observed when light is made to fall on the surface of a metal. when light falls on the surface of a metal, it makes the electron to eject out. This is possible only when light consists of small particle called photons. hence the scientists believe that light is made of streams of particles.

Gekata [30.6K]4 years ago

7 0

-- When you build an experiment that's designed to detect waves,
light behaves like waves.

-- When you do an experiment that's designed to detect particles,
light behaves like particles.

-- The whole basic question that scientists were trying to answer
about 150 years ago is:

Is light made of particles or waves ?

and the answer turned out to be:

Yes .

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Acceleration involves a change in __________.

uysha [10]

"Acceleration" is any change in speed or direction of motion ...
slowing down, speeding up, or curving away from a straight line.

You and I, and all other students of Physics, must re-educate
people. We have to tell everyone that 'acceleration' does NOT
mean 'speeding up'. AND, it doesn't even necessarily mean
any change in speed.

7 0

3 years ago

Read 2 more answers

A 70kg car drives through a curve with radius 50m. What is the minimum angle the road should be tilted to keep the car on the ro

worty [1.4K]

when car moves along a circular path then centripetal force for taking turn will be provided by the component of normal force

Let the road is tilted by some angle

so force equations are given as

$F_n cos\theta = mg$

$F_n sin\theta = \frac{mv^2}{R}$

now divide two equations

$tan\theta = \frac{v^2}{Rg}$

now as it is given to us that

$v = 80 km/h$

$v = 80* \frac{5}{18} = 22.2 m/s$

$R = 50 m$

now we have

$tan\theta = \frac{22.2^2}{50*9.8}$

$tan\theta = 1$

$\theta = tan^{-1}1$

$\theta = 45^0$

so it is inclined at an angle of 45 degree

8 0

3 years ago

A small mass m is tied to a string of length L and is whirled in vertical circular motion. The speed of the mass v is such that

adell [148]

Answer:

(mv^2/R)/(mg)=1/2

v^2=R/2g

7 0

3 years ago

1.Compare how waves are used to send information.

jeyben [28]

Answer:

1:Radio waves are used to carry satellite signals. These waves travel at 300,000 km/s (the speed of light).

2:The standard methods of communication are speaking or writing by a sender and listening or reading the receiver. Most communication is oral, with one party speaking and others listening. ... A mixed message occurs when a person's words communicate one message, while nonverbally, he or she is communicating something else.

3: Today means of communication has increased such a lot that we can receive or send messages from or to far off places. Various means of communication which we use in the modern world are Posts and Telegraphs, Telephone, Radio and Television, Telex, Fax, Pagers, Email, Newspapers and cinema.

8 0

3 years ago

A crude model of the human throat is that of a pipe open at both ends with a vibrating source to introduce the sound into the pi

viva [34]

Answer:Changing Length

Explanation:

We know the Resonant frequency depends upon length and varies as inversely to the length of air column

$frequency\propto \frac{1}{L}$

thus by changing the length of Pipe we can chnge the frequency

8 0

3 years ago