5. a concave mirror gives virtual, refract and enlarged image of the object but image of smelter se
than the size of the object is
a. at infinity
b. between f and c
c. between p and f
d. at e
6. in optics an object which has higher refractive index is called
a. optically rarer
b. optically denser
c. optical density
d. refractive index
7. the optical phenomena, twinkling of stars, is due to
a. atmospheric reflection
b. total reflection
c. atmospheric refraction
fraction
pl me answer the above questions plzzz