Answer:
8.99×10^-7m
Explanation:
The wavelength can be calculated using the expression below
E=hcλ
Where E= energy= 2.21 x 10^-19 J.
C= speed of light= 3x10^8 m/s
h= planks constant= 6.626 × 10^-34 m2 kg / s
E=hcλ
λ= E/(hc)
Substitute for the values
λ=( 2.21 x 10^-19 )/(6.626 × 10^-34 × 3x10^8 )
= 8.99×10^-7m
Answer:
Look at the explanation this one is hard
Explanation:
show your work:
E = hc/ λ
E λ = hc
λ = hc/E
λ = 6.626 x 10^-34 x 3 x 10^8 / 2.21 x 10^-19
=
8.994 x 10-7 m or 899.4 nm
800nm – 3mm is the range of wavelengths for infrared waves.
Night vision cameras use infrared waves.
