# Physics

Light of wavelength 630 nm is incident on a long, narrow slit.
a)Determine the angular deflection of the first diffraction minimum if the slit width is 0.020 mm.

b)Determine the angular deflection of the first diffraction minimum if the slit width is 0.20 mm.

c)Determine the angular deflection of the first diffraction minimum if the slit width is 2.0 mm.

PLEASE. i love you long time!!!!!!

1. 👍 0
2. 👎 0
3. 👁 1,441
1. bsinφ=k λ
sinφ=kλ/b,
a) sinφ=1•630•10⁻⁹/0.020•10⁻³=0.0315
φ=1.8°
b) sinφ=1•630•10⁻⁹/0.20•10⁻³=0.0035
φ=0.18°
c) sinφ=1•630•10⁻⁹/0.20•10⁻³=0.00035
φ=0.02°

1. 👍 0
2. 👎 0
2. the answer for C is .018

1. 👍 0
2. 👎 0

## Similar Questions

1. ### physics

In a double-slit experiment, it is found that blue light of wavelength 460 nm gives a second-order maximum at a certain location on the screen. What wavelength of visible light would have a minimum at the same location?

2. ### physical chemistry

2. The retina of a human eye can detect light when radiant energy incident on it is at least 4.0X10-17 J. For light of 600-nm wavelength, how many photons does this correspond to?

3. ### Physics

Rank in order the following according to their speeds, from fastest (1) to slowest (5): (i) 425-nm-wavelength light through a pane of glass, (ii) 500-nm-wavelength light through air, (iii) 540-nm-wavelength light through water,

4. ### Physics

Light from a sodium lamp ( wavelength= 589 nm) illuminates a narrow slit and is observed on a screen 75 cm behind the slit. The dstance between the first and third dark fringes is 7.5 mm. What is the width (in mm) of the slit?

1. ### physics- please help!!

A beam of microwaves with = 0.7 mm is incident upon a 12 cm slit. At a distance of 2 m from the slit, what is the approximate width of the slit's image?

2. ### Physics

When violet light of wavelength 415 nm falls on a single slit, it creates a central diffraction peak that is 8.80 cm wide on a screen that is 2.75 m away. How wide is the slit?

3. ### physics

A beam of microwaves with wavelength= 1 mm is incident upon a 9 cm slit. At a distance of 2 m from the slit, what is the approximate width of the slit's image?

4. ### physics

microwaves with a wavelength of 15.0 cm strike a slit. What is the maximum slit width that will still result in a large amount of diffraction? 1. 7.50 cm 2. 10.0 cm 3. 15.0 cm 4. 30.0 cm This is a multiple choice and I think it's

1. ### physics

At most, how many bright fringes can be formed on either side of the central bright fringe when light of wavelength 656 nm falls on a double slit whose slit separation is 3.45 × 10-6 m?

2. ### Physics

Light falls on a double slit with slit separation of 2.19 × 10 −6 m, and the ﬁrst bright fringe is seen at an angle of 12.7 ◦ relative to the central maximum. What is the wavelength of the light? Answer in units of nm

3. ### physics

A monochromatic light of wavelength 587.5nm illuminates a slit of width 0.75mm. At what distance from the slit should a screen be placed so that the first dark fringe is at 0.85mm from the center of the diffraction pattern?

4. ### physics

In a Young's double-slit experiment, the angle that locates the second dark fringe on either side of the central bright fringe is 7.2°. Find the ratio d/λ of the slit separation d to the wavelength λ of the light.