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Dear student
Ans 6. Examples of rectilinear propagation of light:
•Rays of light coming from the sun
•Rays of light from a torch also shows rectilinear propagation of light.
Ans 7. Light is important for all living organisms.
It is difficult to imagine life without light. Plants require light for photosynthesis. Several processes such as phototropism depend on light.
Light is important not only for plants but also for animals. Some animals use changes in day time (called diurnal) and seasonal variations for obtaining food, moving from one place to other place (migration) and reproductive activities like attracting their mates.
The diurnal animals like humans, deer, songbirds, squirrels, lizards etc are active during the day i.e in presence of light for obtaining food etc.
Some animals depend on seasonal variation and light intensity for their activities like some migratory birds migrate from colder region to hotter regions during winter season and vice versa. Some animals sleep during winters and some during hot summers.
Regards
Ans 6. Examples of rectilinear propagation of light:
•Rays of light coming from the sun
•Rays of light from a torch also shows rectilinear propagation of light.
Ans 7. Light is important for all living organisms.
It is difficult to imagine life without light. Plants require light for photosynthesis. Several processes such as phototropism depend on light.
Light is important not only for plants but also for animals. Some animals use changes in day time (called diurnal) and seasonal variations for obtaining food, moving from one place to other place (migration) and reproductive activities like attracting their mates.
The diurnal animals like humans, deer, songbirds, squirrels, lizards etc are active during the day i.e in presence of light for obtaining food etc.
Some animals depend on seasonal variation and light intensity for their activities like some migratory birds migrate from colder region to hotter regions during winter season and vice versa. Some animals sleep during winters and some during hot summers.
Regards