Question
Assertion : In a movie, ordinarily $24$ frames are projected per second from one end to the other of the complete film.
Reason : The image formed on retina of eye is sustained upto $1/10\,second$ after the removal of stimulus.
✓
Answer
The image formed on retina of eye is sustained upto $\frac {1}{16}^{th}$ second after removal of stimulus. So, number of frames to be projected on the screen must be at most $16$ per second.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
How is the temperature of stars determined by
If only $2\,%$ of the main current is to be passed through a galvanometer of resistance $G$, then the resistance of shunt will be
→Ketones $(R - \mathop C\limits_{\mathop {||}\limits_O } - {R_1})$ where $R = {R_1} = $ alkyl group. It can be obtained in one step by
→In the circuit given below, $V ( t )$ is the sinusoidal voltage source, voltage drop $V_{A B}(t)$ across the resistance $R$ is
→Standardisation of thermometers is obtained with
A coil is placed perpendicular to a magnetic field of $5000 \mathrm{~T}$. When the field is changed to $3000 \mathrm{~T}$ in $2 \mathrm{~s}$, an induced emf of $22 \mathrm{~V}$ is produced in the coil. If the diameter of the coil is $0.02 \mathrm{~m}$, then the number of turns in the coil is:
→If $L = 2.331\, cm$, $B = 2.1\, cm$, then $L + B =$
→The blocks $A$ and $B$ are arranged as shown in the figure. The pulley is frictionless. The mass of $A$ is $10 \,kg$. The coefficient of friction of $A$ with the horizontal surface is $0.20$. The minimum mass of $B $ to start the motion will be...... $kg$
→One mole of ideal gas undergoes a linear process as shown in the figure below. Its temperature expressed as a function of volume $V$ is
→$Assertion$ : There are very small sporadic changes in the speed of rotation of the earth
$Reason$ : Shifting of large air masses in the earth's atmosphere produce a change in the moment of inertia of the earth causing its speed of rotation to change.
→$Reason$ : Shifting of large air masses in the earth's atmosphere produce a change in the moment of inertia of the earth causing its speed of rotation to change.