• #### 1.  Fiber optic cables work because of the principle of _____.

• total internal refraction
• incomplete internal refraction
• total internal reflection
• partial internal reflection
• #### 2.  How is light affected by an increase in the index of refraction?

• Its frequency increases
• Its frequency decreases
• Its speed increases
• Its speed decreases
• #### 3.  Choose the correct statement that describes what happens to the ray of light if the critical angle is 48o and the angle of incidence is 48o

• refract
• totally internally reflect
• travel along the boundary
• #### 4.  The following is an example of?

• Fluorescence
• Bioluminescence
• Chemiluminescence
• Electric Discharge
• #### 5.  In the formula m = hi/ho, the variable "m" refers to ___.

• the height of the image
• the height of the object
• the focal point
• how reduced or enlarged the image is compared to the object
• #### 6.  What type of image does this lens form?

• Virtual image
• Real Image
• No Image
• #### 7.  The following type of light source is

• Incandescence
• Fluorescence
• Electric Discharge
• Phosphorescence

• scattering
• dispersion
• interference
• refraction
• #### 9.  What happens to light during total internal reflection?

• The angle of incidence is greater than the critical angle.
• The angle of reflection is the same as the critical angle.
• The angle of refraction is less than the critical angle.
• The angle of incidence is zero.
• #### 10.  According to the Law of reflection, a light ray striking a mirror

• continues moving through the mirror in the same direction
• moves into the mirror at a slightly different angle
• bounces off the mirror toward the direction it came from
• bounces off the mirror at the same angle it hits.
• #### 11.  The point in the middle way between a curved mirror and the center of curvature is the

• principle point
• focal point
• center of curvature
• principle axis
• #### 12.  The line that passes through the center of a curved mirror is called

• focal point
• center of curvature
• principle axis
• light ray

• speed
• wavelength
• frequency
• amplitude
• #### 14.  Coherent sources have

• same frequency
• constant or zero phase difference
• both a and b
• none of these
• #### 15.  When light passes at an angle to the normal from one medium into another in which its speed is higher

• it is bent toward the normal.
• it always lies along the normal.
• it is unaffected.
• it is bent away from the normal.
• #### 16.  All rays that are parallel to the principle axis in a concave mirror reflects

• Towards the focal point
• Away from the focal point
• Towards the center of curvature
• Away from the center of curvature

• reflection
• refraction
• dispersion
• polarisation
Report Question
access_time