Answer:
Angle and speed of wave
Explanation:
The two phenomena involved here are:
- Reflection: reflection occurs when a light wave bounces off the interface between two mediums, returning into the first medium, at a different angle
- Refraction: refraction occurs when a light wave passes through the interface between the two mediums, passing into the second medium, changing direction and speed
The coefficient of reflection tells what is the fraction of the wave that is reflected over the total; it is calculated as
where
are the index of refraction of the 1st and 2nd medium
are the angle between the ray of light and the normal to the interface in the 1st and 2nd medium
From the formula, we see that the % of wave that is reflected depends on the angle and the index of refraction. Moreover, the index of refraction is related to the speed of the wave by:
where c is the speed of light in a vacuum and v the speed of light in the medium; therefore, the correct answer is
Angle and speed of wave
Answer:
radio waves, micro wave, x-rays
Explanation:
A) To obtain an inverted image of an object of same size a convex lens is used.
B)
In this question we have given
Distance between candle flame and screen=4
it means distance between candle flame and lens +distance between lens and screen =4m
u+v= 4m
u= v
therefore, 2u= 4m
or, u=-2m ( u is taken negative because it lies on left side of the lens)
and v=2m
we have to find the focal length of convex lens
Hence, Focal length of the lens is 1m
and lens should be placed at a distance of 2m from the flame
The fraction of the tensile strength which is the stress on the femur is 1.4%.
<h3>What is Tensile strength?</h3>
This is defined as the amount of load or stress that a material can handle before it stretches and breaks.
The femur which is located in the thigh is the largest bone in the body and it exerts a fraction of 1.4% tensile strength through the stress encountered on the femur when the man stands with one leg.
Read more about Tensile strength here brainly.com/question/25748369
Answer:
Continuous random variable
Explanation:
The distance that baseball travels after being hit is a random variable and it assume any real value defined on the sample space.
The distance is measurable and thus is continuous random variable because continuous variable cannot be counted but could be measured.
