MCQ
The phase difference between incident wave and reflected wave is $180^o $  when light ray
  • Enters into glass from air
  • B
    Enters into air from glass
  • C
    Enters into glass from diamond
  • D
    Enters into water from glass

Answer

Correct option: A.
Enters into glass from air
a
(a)When light reflect from denser surface phase change of $\pi $ occurs.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

An electric bulb is designed to draw power $P_0$ at voltage $V_0$. If the voltage is $V$ it draws a power $P$. Then
A mixture of hydrogen and oxygen has volume $500\, {cm}^{3}$, temperature $300\, {K}$, pressure $400\, {kPa}$ and mass $0.76\, {g}$. The ratio of masses of oxygen to hydrogen will be :-
Match the column
$(A)$ Hallwachs $\&$ Lenard  $(P)$ Transformers
$(B)$ Franck-Hertz $(Q)$ Microwave
$(C)$ Klystron valve  $(R)$ Quantization of energy levels
$(D)$ Nicola Tesla $(S)$ Photoelectric effect
Light of wavelength $1824 Å$, incident on the surface of a metal, produces photo-electrons with maximum energy $5.3 eV.$ When light of wavelength $1216 Å$ is used, the maximum energy of photoelectrons is $8.7 eV$. The work function of the metal surface is .............. $eV$
A $9\, V$ battery with internal resistance of $0.5\,\Omega $ is connected across an infinite network as shown in the figure. All ammeters $A_1 , A_2, A_3$ and voltmeter $V$ are ideal. Choose correct statement
A body, thrown upwards with some velocity reaches the maximum height of $50 \,m$. Another body with double the mass thrown up with double the initial velocity will reach a maximum height of............$m$
Nine point charges are placed on a cube as shown in the figure. The charge $q$ is placed at the body centre whereas all other charges are at the vertices. The electrostatic potential energy of the system will be
Two similar bar magnets $P $ and $Q$ , each of magnetic moment $M,$  are taken, If $P$ is cut along its axial line and $Q$ is cut along its equatorial line, all the four pieces obtained have
The orbital velocity of an artificial satellite in a circular orbit just above the earth's surface is $v$. For a satellite orbiting at an altitude of half of the earth's radius, the orbital velocity is
A parallel plate capacitor with air between plates has a capacitance of $8\,\mu F$ what will be capacitance if distance between plates is reduced by half, and the space between them is filled with a substance of dielectric constant $6$ ?.....$\mu F$