In a physics lab, light with wavelength 490 nm travels in air from a laser to a photocell in 17.0 ns. when a slab of glass 0.840 m thick is placed in the light beam, with the beam incident along the normal to the parallel faces of the slab, it takes the light 21.2 ns to travel from the laser to the photocell. what is the wavelength of the light in the glass?

196 nm

Explanation:

Given

wavelength

time required by laser to travel in air

slab thickness

time requires by laser to travel

so it takes more in glass slab

suppose n is the refractive index of glass

n-1=1.5

n=2.5

Wavelength of light in Glass

heat the gas and measure the pressure

hi,

what occurs during a solar eclipse?

there are small tides across earth.

the moon is between earth and the sun.

p.s. im not sure if the first answer is correct because during a solar ecliphse there are spring tides and i dont know if they are the same.