A diffraction grating is to be used to find the wavelength of the light in the emission spectrum of a gas. The grating spacing is not known,
but a light having a known wavelength of 632.8 nm is deflected by 43.2° away from the central maximum in the second order by this grating. Light of the wavelength to be measured is deflected by 48.2° away from the central maximum in the second order. What is the wavelength of this light?
689 nm
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A pn-junction diode at 300 K produces a current density 1.00×104 A/m2 , with a forward bias of 0.10 V. Calculate the current density for a forward bias of 0.300 V.
What will be an ideal response?
_________ occurs when light travels out of a gravitational field, loses energy, and its wavelength grows longer
a. A gravitational blue shift b. The solar wind c. A gravitational redshift d. A X-ray burst e. A pulsar wind
Fission fragments are
A. harmless particles emitted in radioactivity B. among the most dangerous kind of radiation C. ghost-like particles that pass through the Earth D. the source of most energy in the Sun
A projectile is launched with an initial velocity of 80 m/s at 30° above the horizontal. Neglecting air resistance, what is horizontal component of the projectile's acceleration?
A) 40 m/s2 B) 0 m/s2 C) 69 m/s2 D) 9.8 m/s2 E) 80 m/s2