Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

why are alkali metal surfaces most suited as photo-sensitive surfaces?

why are alkali metal surfaces most suited as photo-sensitive surfaces?

Grade:8

1 Answers

Apoorva Arora IIT Roorkee
askIITians Faculty 181 Points
6 years ago
Their work funtions are smallest among all metals. So electrons come out easily.
Na - 2.6 eV, K - 2.4 eV and Cs has the lowest work function in the first group 2.2 e V
If you calculate work function corresponding to blue light of 400 nm, you will get 3.1 eV. So even visible light can eject electrons from alkali metal surface.
Thanks and Regards
Apoorva Arora
IIT Roorkee
askIITians Faculty

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free

10th iCAT Scholarship Test Registration Form