Need a help 1-6 If radio waves from a certain transmitter have a wavelength of 1

Question

Need a help 1-6

If radio waves from a certain transmitter have a wavelength of 100 meters what is the transmitter's frequency? Light of wavelength 500 nm enters glass having an index of refraction of 1.5. What is the wavelength of the light wave in the glass? A ray of light in glass is incident on a plane glass-air boundary. The index of refraction of glass is 1.50 and the index of refraction of air is 1.00. The angle of incidence in glass is 45degree. What happens to this ray? It is refracted into the air at an angle of refraction of 45degree. It is totally reflected in the glass at an angle of reflection of 45degree. It is refracted into the air at an angle of refraction of 56.3degree. It is refracted into the air at an angle of refraction of 90degree. It is refracted into the air at an angle of refraction of 28.1degree. What kind of image does a plane mirror produce? virtual and upright b. real and inverted c. virtual and inverted d. real and upright A concave mirror has a radius of

Explanation / Answer

Ans.1 )

speed of radio waves = c = speed of light = 3* 108 m/s

wavelength = ? = 100 m

frequency = ? = c / ? = 3*106 m/s

Correct answer is (b)

Ans.2 )

? = ?0 / n

? = wavelength of light in glass

?0 = wavelength of light in vaccum = 500 nm

n = refractive index of glass = 1.5

So, ? = 500 nm / 1.5 = 333.33 nm

Correct answer is (a)

Ans.3 )

refractive index of glass = n1 = 1.50

refractive index of air = n2 = 1.00

angle of incidence in glass = i = 45o

Let

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