A bio-convex lense (refractive index 3/2) has radii of curvature 20 cm each. It is fitted to a hole in a large box filled with water (refractive index = 4/3). A point object is placed outside the box at a distance of 40 cm from lens on its axis. Distance of image formed in water is:
(a) + 160 cm
(b) + 60 cm
(c) - 100 cm
(d) + 120 cm
Why does Iron master first call peddlar as Nils Olof and afterwards Captain Von Stale?
Mr. Lamb says to Derry, " It's all relative. Beauty and the beast." What does he mean by that?
The following graph shows the variation of stopping potential V0 with the frequency ν of the incident radiation for two photosensitive metals X and Y:
(i) Which of the metals has larger threshold wavelength? Give reason.
(ii) Explain giving reason, which metal gives out electrons, having larger kinetic energy, for the same wavelength of the incident radiation.
(iii) If the distance between the light source and metal X is halved, how will the kinetic energy of electrons emitted from it change? Give reason
(i) Let = Frequency of incident radiations of metal Y
= Frequency of incident radiations of metal X
Therefore, metal X has larger threshold wavelength.
(ii) Since the kinetic energy of the emitted electrons is directly proportional to the frequency of incident radiation, metal Y having larger incident frequency will have larger kinetic energy.
∴ Metal Y has larger kinetic energy.
(iii) Kinetic energy of the emitted photoelectrons is independent of the intensity of the incident light. Hence, kinetic energy of the emitted photoelectrons remains unchanged if the distance between the light source and metal X is halved.
in this in (ii) part why work function.is not considered kindly reply fast... ??
what does this line signifies "jack didn't like women when they took anything for granted;he liked them apprehensive, hanging on his words."
"Just this once, then, Shirley Temple." What is meant by this line?
should informal invitations be enclosed in a box?
Ramila buys a computer for Rs.38400 which includes 10%discount and 6% sales tax on the listed price.Find the list price of the computer..please...please answer fast..
What was Jo's new "reality phase" in the story, wizard hits mommy?
a student noticed that an organism by mistake was cut into 2 parts. after some time, both parts developed into new individuals.
1. name the method of reproduction.
2. state the type of cells which carry this process.
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