A player passes a basketball to another player who catches it at the same level from which ot was thrown. The initial speed of t
1 answer:
(a) The initial direction of the ball is horizontal.
(b) The time of flight of the ball is 0.65 s.
<h3>Initial direction of ball</h3>The initial direction of the ball is horizontal since the player catches the ball at the same level which implies that the speed of the of the ball was constant through out the motion.
<h3>Time of flight of the ball</h3>The time of flight of the ball is calculated using the following kinematic equation.
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Answer:
Photons.
Explanation:
Einstein explained the photoelectric effect by proposing that light is transmitted, not in the form of continuous waves, but in the form of many tiny, discrete packets of energy called photons. Photons are massless and chargeless particle. The energy of a photon is given by :
f is the frequency of photon.
Answer:
Explained
Explanation:
Michelson contrast is used for patterns where the distribution of bright and dark segments is nearly equal.
It is given by:
where I_max = maximum illumination and I_min = minimum illumination
we know that
typically, I_min = 54% of I_max (general standard)
or I_min = 0.54 I_max
putting this value in above equation to get m
this approximately corresponds to m = 0.3 or 30%
hence, 30% recommended as the minimum Michelson contrast