9.) Which of the following types of electromagnetic waves has the highest energy
ID: 1411452 • Letter: 9
Question
9.) Which of the following types of electromagnetic waves has the highest energy per photon?
a. radio waves b. x-rays c. microwaves d. infrared radiation
10.) The medium has an index of 2.684. How fast is the light traveling through that medium?
a. 1.1 x 10 ^ 8 m/s b. 3 x 10 ^ 8 m/s c. 2.684 m/s
11.) What is the index of refraction of a refractive medium if the angle of incidence in air is 410 and the angle of refraction is 260.
a. 4.5 b. 1.5 c. 6.3
12.) What causes a negatively charged balloon to be attracted to a positively charged sweater?
a. inducted charge b. temperature c. electrostatic forces
13. The term below that best explains why a negatively charged balloon sticks to a neutral wall is...
a. inducted charge b. electostatic forces c. both
14.) As the distance between two point charges increases, the force of attraction or repulsion between them __________.
a. niether increaes nor decreses b. decresases c. increases, the decreases d. increases
15. How is the force between two charges affected by the magnitude of the charge?
a. The force increases as the charge increases b. The force decreases as the charge decreases c. none of the above d. The force decreases as the charge increases
Explanation / Answer
9) as the energy of photon is given as
E = h * frequency , as frequency is highest for x - rays
energy is highest for b. x-rays
10) speed of light in medium = 3 *10^8/2.684
speed of light in medium = 1.1 *10^8 m/s
a. 1.1 x 10 ^ 8 m/s
11)
refractive index = wavelength of light in vacuum/wavelength in medium
refractive index = 410/260
refractive index = 1.5
12)
the force between charges is electro static force
hence , c. electrostatic forces
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