Light passes through a pair of narrow slits with a 0.67-mm separation. it is found that the fourth bright fringe makes an angle of 0.19° with the normal. what is the light’s wavelength in nanometers? answer in nanometers

The wavelength of the light is 555 nm.

Explanation:

according to Bragg's law..

n×λ = d×sin(θ)

n is the fringe number

λ is the wavelength of the light

d is the slit separation

θ is the angle the light makes with the normal at the fringe.

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

-reverse card

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it