Question

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Answer 1

6. There are three main types of scattering

Rayleigh Scatter :-Rayleigh scatter occurs when radiation (light) interacts with molecules and particles in the atmosphere that are smaller in diameter than the wavelength of the incoming radiation

Mie Scatter :-Mie scatter occurs when the wavelength of the electromagnetic radiation is a similar size to the atmospheric particles.

Non-Selective Scatter:-Non-selective scattering occurs when the diameter of the particles in the atmosphere are much larger than the wavelength of radiation

7(a).

Image distance, v=±12 cm (A real image)

Object distance, u

Focal length, f=+10 cm

1/v−1/u=1/f

We get: 1/12−1/u=1/10

1/12−1/10=1/u

5−6/60=1u

−1/60=1/u

So, Object distance, u= -60 cm

hence the object should be place at a distance of 60 cm in front of the convex lens and object is on the left side of the lens(as there is minus sign)

(b) angle of refraction =r

angle of incidence=i=30°

so, according to Snell's law=

sini/sinr=(refractive index of glass)/(refractive index of air)

sin30°/sinr = 1.5/1

sinr=sin30°/1.5

sinr=1/3

sinr=0.5773

r=35°16'

8. First law: According to the first law of refraction, the incident ray, the refracted ray and the normal at the point of incidence, all lie in the same plane.

Second law: According to the second law of refraction, the ratio of the sine of angle of incidence to the sine of angle of refraction is constant for a given pair of media

Answer 2

Answer:

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