When light travelling in a certain medium falls on the surface of another medium, a part of it turns back in the same medium. This phenomenon is called
A. reflection
B. refraction
C. defraction
D. acoustics
Related Questions on Chapter 6: Geometrical Optics Physics Mcqs for High School - Grade 10
A. −6.58 cm
B. −8.41 cm
C. −7.8 cm
D. −9.6 cm
The lens with a long focal length is
A. not strongly curved only
B. thin only
C. thick
D. not strongly curved and thin
The variation of focal length to form a sharp image on retina is called
A. accommodation
B. aperture
C. retina control
D. Sutter
In concave mirror, the size of image depends upon
A. size of object
B. position of object
C. area covered by object
D. shape of object
If the object is towards the right side of the lens, the object distance will be
A. zero
B. constant
C. positive
D. negative