1. Which of the following devices use the principle of reflection?
a) Microscope
b) Periscope
c) Telescope
d) Both b and c
2. Assertion (A): Copper is widely used in electrical appliances
Answer (2)
The devices that use the principle of reflection are the periscope and the telescope. A microscope, however, primarily uses refraction. Hence, the correct choice is d) Both b and c.
;
The devices that utilize the principle of reflection are the periscope and the telescope. A microscope, on the other hand, operates mostly using refraction. Therefore, the correct choice is both b and c. ;
