I think answer should be 15 I think you should google it on the internet
Answer:
first minimum distance from the center = 0.417 m m
Explanation:
given,
wavelength (λ) = 506 nm
d = 0.075 mm = 0.000075 m
tanθ = x /2
d sinθ = m λ
m=1 ( 1 st minimum )
0.000075 × sin θ = 506 × 10⁻⁹
sin θ =
sin θ = 0.00675
θ = sin⁻¹(0.00675)
θ = 0.00675
x = 0.000417 m
hence, the first minimum distance from the center = 0.417 m m
Answer:
Solids have a definite shape and volume, its particles vibrate slowly.
Liquids have no definite shape, the particles move randomly around its container, and they have a fixed volume.
Answer:
1 cm ± 0.05 cm
Explanation:
A ruler is readable to ±0.05 cm. This implies that any measurement taken using the ruler could be uncertain by 0.05 cm above or below the true value.
Hence, ±0.05 cm is called the uncertainty or the precision of the ruler.
We obtained this from the fact that the meter rule is graduated in units of centimetres (cm). This implies that the smallest scale division is 1 mm. Thus, the uncertainty of the meter rule is given by; Δx = smallest increment/2 = 1mm/2 = 0.5mm = 0.05cm.
<u>In farsighted eyesight (Hypermetropia )
</u>
A person with hypermetropia can see distant objects clearly but cannot see nearby objects distinctly.The light rays from a close by object are focused at a point behind the retina
<u> In nearsighted eyesight (Myopia )
</u>
A person with myopia can see nearby objects clearly but cannot see distant objects distinctly.the image of a distant object is formed in front of the retina
<u>corrective measure in each case
</u>
1. <u>In farsighted eyesight
</u>
This defect can be corrected by using a convex lens of appropriate power
2.<u> In nearsighted eyesight
</u>
A concave lens of suitable power will bring the image back on to the retina and thus the defect is corrected.
