Answer:
Explanation:
Width of slit a = 1 x 10⁻³ / 210
a = 4.76 x 10⁻⁶ m .
angle at which first order peak is formed
= λ / a (where λ is wavelength and a is width of slit)
given λ = 506 x 10⁻⁹ m
a = 4.76 x 10⁻⁶
θ = 506 x 10⁻⁹ / 4.76 x 10⁻⁶
= 106.3 x 10⁻³ radian .
first order peak is formed at an angle of 106.3 x 10⁻³ radian .
Option B is correct. If an incident light ray hits a flat, smooth object at 28°. It will reflect off at an angle of 28°.
<h3>What is the law of reflection?</h3>
The law of reflection specifies that upon reflection from a downy surface, the slope of the reflected ray is similar to the slope of the incident ray.
The reflected ray is consistently in the plane determined by the incident ray and perpendicular to the surface at the point of reference of the incident ray.
When the light rays descend on the smooth surface, the angle of reflection is similar to the angle of incidence, also the incident ray, the reflected ray, and the normal to the surface all lie in a similar plane.
If an incident light ray hits a flat, smooth object at 28 degrees, it will reflect off at an angle of 28°.
Hence, option B is correct
To learn more about the law of reflection, refer to the link;
brainly.com/question/12029226
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Answer:
Box A
Explanation:
Let mass of each wooden box =m
Density of box A=
Density of box B =
Density,
Density of inversely proportional to volume.
The volume of box with smaller density is larger than the volume of box with large density.
When the boxes are submerged under water.
Then, the buoyant force=
Where V=Volume of displace fluid.
Density of fluid
Buoyant force of box A=
Buoyant force of box B=
Force=Buoyant force
Acceleration is directly proportional to volume.
Therefore,the box with large volume has greater acceleration.
Hence, the box A has greater acceleration.
Answer:
it's b and then c
Explanation:
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