After Compton scattering, the scattered x-ray has_______.
A: Higher energy
B: Higher velocity
C: Less mass
D: Longer wavelength
A: Higher energy
B: Higher velocity
C: Less mass
D: Longer wavelength
D
举一反三
- In a Compton scattering experiment, a photon of energy E is scattered from an electron at rest. After the scattering event occurs, which of the following statements is true? A: The frequency of the photon is greater than E/h. B: The energy of the photon is less than E. C: The wavelength of the photon is less than hc/E. D: The momentum of the photon increases.
- Nonselective scattering is caused by particles that are much larger than the wavelength of the scattered radiation. （ ）
- Compared to a single-price monopoly, a perfectly competitive market with the same costs produces ________ output and has a ________ price. A: less; lower B: less; higher C: more; lower D: more; higher
- The wrong statement about the formula is ( ) A: The higher the frequency, the shorter the wavelength B: The lower the frequency, the shorter the wavelength C: The worse the penetration, the higher the discrimination D: the better the penetration, the lower the discrimination
- At what scattering angle will incident 100-keV x-ray leave a target with energy of 90 keV? Note that here we only consider the Compton scattering with valence (free) electrons. A: 85 degree B: 80 degree C: 75 degree D: 65 degree E: 55 degree
内容
- 0
The government has said it needs to_________ revenue to offset its higher energy costs.
- 1
The higher the threshold, the higher the tissue excitability () A: The higher the excitability B: The lower the level of excitement C: The higher the level of excitement D: The less excitability E: No excitability
- 2
In the model of monopolistic competition, compared to a firm with a lower marginal cost, a firm with a higher marginal cost will set a ________ price, produce ________ output, and earn ________ profits. A: higher; less; more B: higher; less; less C: lower; less; less D: lower; more; more
- 3
TheOlympicmottoisfaster,higher,___. A: farther B: deeper C: longer D: stronger
- 4
A firm that has higher free cash flow have a higher value? （ ）