Answer:
B. it showed that the wave nature of light is a probability statement of where photons are going to be
Explanation:
When the light propagates through a medium it is taken to act as a wave, it shows all the features of a wave such as reflection, refraction, diffraction.
- But when the light ray is incident on a surface generating an energy interaction with the particles of the matter on which it is incident then it is treated as matter. Light is made of particles called photons.
- The collision of photons with the surface electrons in some materials leads to the ejection of the valance electrons from the surface in excited state.
Energy of photon is given as:
where:
h = Planck's constant
frequency of the wave
Answer:
The angle of incidence at which total internal reflection takes place will be equal to 
Explanation:
We have given that light is traveling from a medium of refractive index x 2.7 to a medium of refractive index 1.6
So refractive index of first medium 
and 
We have to find the angle of incidence for total internal reflection
For total internal reflection
So the angle of incidence at which total internal reflection takes place will be equal to
At rest, initial speed zero
x=v(initial) t+ 1/2 at^2
-1000m=0(10) + 1/2 a 10^2
-1000m=50a
a = -20 m/s^2
Answer:
Explanation:
Given:
Capacitance, C = 85 pF = 85 × 10⁻¹² F
Resistance, R = 75 MΩ = 75×10⁶Ω
Charge in capacitor at any time 't' is given as:
where,
Q₀ = Maximum charge = CE
E = Initial voltage
t = time
also, Q = CV
V= Final voltage = 90% of E = 0.9E
thus, we have
or
or
taking log both sides, we get
or
or
or
Mass= density x volume
1.3 kg/m^3 x ( 2.5x4x10) m^3
= 130 kg
