**Answer:**

214.3 x 10⁻⁹ m or 214.3 nm

**Explanation:**

= slit separation in the experiment = 3.00 x 10⁻⁵ m

= screen distance from the slits = 2.00 m

= Order of the bright fringe = 7

λ = Wavelength of the light

= distance of the bright fringe from the central bright fringe = 10 cm = 0.10 m

Position of the bright fringe is given as

λ = 214.3 x 10⁻⁹ m

λ = 214.3 nm

F = M A

Force = (mass) x (acceleration)

= (1,650 kg) (4 m/s²) = 6,600 kg-m/s² = 6,600 Newtons

**Answer:**

an orange fringe at 0°, yellow fringes at ±50° and red fringes farther out.

**Explanation:**

In the visible spectrum- red to violet, red has the highest wavelength.

The maximum internsity for diffraction grating is given by,

Sinθ = mλ/d

It is concluded that the angle of diffraction increases with increase in wavelength'λ' . So, red fringe will be farthest from the center, orange light will be at the center and yellow fringe will be at 50°.

Therefore, The new pattern consists of : an orange fringe at 0°, yellow fringes at ±50° and red fringes farther out.

**Answer:**

2.40 x 10⁻¹³ C

**Explanation:**

= number of electrons = 6.25 x 10⁶

= charge on electron = - 1.6 x 10⁻¹⁹ C

= number of protons = 7.75 x 10⁶

= charge on proton = 1.6 x 10⁻¹⁹ C

Net charge is given as

Q = +

Q = (- 1.6 x 10⁻¹⁹) (6.25 x 10⁶) + (1.6 x 10⁻¹⁹) (7.75 x 10⁶)

Q = 2.40 x 10⁻¹³ C

A "variable" is a person, object, or some other well-defined item upon which a treatment is applied.

A variable is basically what you do your tests on whenever you need to test something