Physics, 17.10.2019 18:50 madi1820

Reflection is the bouncing of light rays off of a surface. which situation is not an example of reflection?

question 5 options:

a. looking at yourself in a mirror

b. focusing light through a camera lens

c. seeing an image of yourself in a still lake

d. looking at your teacher at the front of the class

Answers: 1

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Answer from: Greekfreak

The answer is B. I just took the test.

I hope this helps. :)

Answer from: linag969p9xeno

b.focusing light through a camera lens

Explanation:

Reflection is an optical phenomenon in which light bounces off an opaque surface on which it falls.

A mirror is formed of glass which has highly lustrous metal coated at the back. The light bounces of the surface. The image forms behind the mirror. The image is formed at the same distance as object and of the same height.

A still lake also acts as a mirror. Thus, reflection takes place from its surface and the image can be seen.

We are able to see objects when light from some source bounces off it and reaches our eye. Thus, reflection occurs here.

But, in case of camera lens, the light passes through a converging lens focuses at a point. Here, the phenomenon of refraction occurs not reflection.

Answer from: Quest

the grams of oxygen gas that can be produced is 20.6 grams of o₂

calculation

2liclo₃ → 2 licl + 3 o₂

step 1: find the moles of liclo₃

moles = mass÷ molar mass

from periodic table the molar mass of liclo₃ =6.9 +35.5 +(16 x3) =90.4 g/mol

moles=38.7 g÷90.4 g/mol=0.4281 moles

step 2: use the mole ratio to calculate the moles of o2

from equation above, liclo₃: o₂ is 2: 3

therefore the moles of o₂=0.4281 moles x3/2 =0.6422 moles

step 3: find mass of o₂

mass= moles x molar mass

from periodic table the molar mass of o₂ = 16 x2= 32 g/mol

mass=0.6422 moles x 32 g/mol = 20.6 grams of o₂

Answer from: Quest

weight of the box is given as

$w = 112.1 n$

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

$w_x = w sin\theta$

here we have

$w = 112.1 n$

$w_x = 112.1 sin42$

$w_x = 75 n$

so it requires 75 n force to move it upwards

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Reflection is the bouncing of light rays off of a surface. which situation is not an example of refl...

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