Question

एक अवतल दर्पण की फोकस दूरी 10 सेंटीमीटर है दर्पण से 20 सेंटीमीटर दूरी पर रखी वस्तु के प्रतिबिंब की स्थिति ज्ञात कीजिएplz solve this question ​

Answer 1

Answer:

The focus distance of a concave mirror is 10 cm. Find the position of the image of the object placed 20 cm from the mirror.

Explanation:

Here f = - 20cm,

u = - 20cm

(sign convention)

Applying mirror's formula,

=) 1/f = 1/v + 1/u

=) - 1/20 = 1/v - 1/20

=) - 1/20 + 1/20 = 1/v

=) 0/20 = 1/v

=) v = 20/0

=) v = infinity,

Image is formed at infinity