Question

1. (10) Light with length of wave A- Yours Last4sst N)nm is the predominant wave in infrared region. What is the energy (in ev) carried by a quantum of this light? a) 1239.9/ (IN) b) (EN) /662 c) 3.75 ($N) d) 1.24/ (HN) e) none of this is true 2. (15 An object with a height 40 mm lies d 3 (#N)mm in front of a lens with focal length of f 2 (N) m m. Find the height of image a) 12 mm b)20 cm c) 8 cm d)14 cm; e) none of these is true 3(10). Determine the wavelength( nm) and color of Light emitted when a hydrogen atom in makes a transition from the m NO SSALast 4) to n 2 energy level. Hint: En 13.6ev/n? a)554,Y b 410,V c)683 ,R d)366,Uv e) none of this is true 4. (15) The four resisters (R1 R2 R3 R4-R) are connected in series and in parallel with the power supply (v 45 v) as shown in Figure The 45 v battery delivers P 60 w of power to the circuit What is the resistance R (in o) of each resistor? a)1.35 b)27 d)13.5 e)None of this is true 5 (15Calculate the speed of an object m g whose kinetic energy is exactly half its total energy. a) 0.566 c b)0.666c c)0.866 c d)0.966 c e) none of this is true 6.10)Light of wavelength 680nm falls on two slits and produces an interference pattern in which (m 4) the fourth order fringe is 38 mm from central fringe on a screen L 2m away. What is the separation d (in mm) ofthe two slits? a00.14 b) 0.57 c) 0.89 d) 1.4 e)None of this is true 7. (10 An electron has a de Broglie wavelength 5A.Whatisits speed? a) 1.5 Mm/s b)2.3 Mm/s c 3.5Mm/s d)c e)None of this is true B. (15) what is the speed of electrons if the metal with work function a 2.5ev is illuminating by light of A-365nm? 3.2M mih b) 16 Mm/s c) 32 x 106m/s e) None of these is true
0 0
Add a comment Improve this question Transcribed image text
Answer #1

Please upload questions separately. I am solving the SECOND question only.

(0 2mm 9 1 of 1

Add a comment
Know the answer?
Add Answer to:
Light with length of wave lambda = Yours Last4sst = N) nm is the predominant wave...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT