PLEASE ANSWER THESE FROM 13TH ITS VERY URGENT.
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Sol. 13
a) 360/120-1
= 2 images
Solve other in the same manner first divide them by 360 then subtract 1
Ans14 The scattering of white light into seven different colours when it is made to pass through a prism. Making of Rainbow is the natural phenomenon which is an example of dispersion of light.
Ans15 Near point 25cm and far point infinity(25 to infinity)
Ans16 The ability of eye to continue to see the image even after the object is removed is known as persistence of vision. Every image remains on retina for 1/16th of a second even if the object is removed.
Ans17 Transparent- Objects through which loght rays can pass completely. Example - Glass
Translucent- Objects through which light rays passes partially. Example- Butterpaper
Opaque- Objects through which light rays cannot pass. Example- Cardboard
Ans18 Virtual image is normally formed on a plane mirror. It is always erect. It is formed above the principal axis.
Ans19 Real image is the actual image of the object which is always inverted. It is formed below principal axis.
Ans20 Bending of light rays when it moves from one medium to another is known as refraction of light.
a) 360/120-1
= 2 images
Solve other in the same manner first divide them by 360 then subtract 1
Ans14 The scattering of white light into seven different colours when it is made to pass through a prism. Making of Rainbow is the natural phenomenon which is an example of dispersion of light.
Ans15 Near point 25cm and far point infinity(25 to infinity)
Ans16 The ability of eye to continue to see the image even after the object is removed is known as persistence of vision. Every image remains on retina for 1/16th of a second even if the object is removed.
Ans17 Transparent- Objects through which loght rays can pass completely. Example - Glass
Translucent- Objects through which light rays passes partially. Example- Butterpaper
Opaque- Objects through which light rays cannot pass. Example- Cardboard
Ans18 Virtual image is normally formed on a plane mirror. It is always erect. It is formed above the principal axis.
Ans19 Real image is the actual image of the object which is always inverted. It is formed below principal axis.
Ans20 Bending of light rays when it moves from one medium to another is known as refraction of light.
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