सूर्य का प्रकाश पृथ्वी की सतह तक पहुँचने में लगभग कितना समय लेता है, यदि सूर्य और पृथ्वी के बीच की औसत दूरी 1.5 × 108 किमी है?

The light of the Sun takes about ________ minutes to reach the Earth.

The magnification (m) of a spherical mirror is given by m = -v/u, where v and u are the image and object distances, respectively. Which of the following statements is correct?

Match Column I (types of mirrors) with Column II (characteristics of images formed by mirrors) and select the correct option: Column I i. Plane mirror ii. Concave mirror iii. Convex mirror Column II A. Erect, virtual, and smaller in size B. Erect, virtual, and same size as the object C. Real and inverted image except when the object is placed very close to the mirror