Answer:
J
Explanation:
The complete statement is given as
What is the maximum kinetic energy of electrons ejected from barium (Wo = 2.48 eV) when illuminated by white light, 400 nm to 750 nm ?
= wavelength of the white light = 400 nm = 400 x 10⁻⁹ m
= speed of white light = 3 x 10⁸ ms⁻¹
Energy of the white light is given as
= Work function of barium = 2.48 eV = 2.48 x 1.6 x 10⁻¹⁹ J
= Maximum kinetic energy
Using photoelectric equation we have
¿Es esta una pregunta verdadera o falsa? Por cierto, no hay mucha gente que hable español en esta aplicación, así que buena suerte.
The starting point for measuring motion is called : The Reference Point.
Answer:
The horizontal distance from the to the bottom of the pool is 3.831 m
Solution:
As per the question;
Height of the pool, H = 1.5 m
Depth of the pool, D = 2.75 m
Refractive index of air,
Refractive index of air,
Angle of the beam at the water surface,
Now,
The angle of incidence is given by
Now, using Snell's law:
Now,
From the normal, the horizontal image distance, d' is given by:
Now,
From the normal, the horizontal object distance, d'' is given by:
Thus the horizontal distance is given by:
d' + d'' = 1.979 + 1.852 =3.831 m